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2024.4.15 updated


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＜History＞

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＜Research Activity＞　

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（Papers）

  1. Keitaro Horikawa, Hiroshi Okada and Motohiro Kanno : Effect of A Small Amount of Lithium on Hot Ductility of Al-Mg Base Alloys, Materials Science Forum, Vol.2, pp.1181-1186, 1996.
  2. Kenichiro Ueda, Keitaro Horikawa and Motohiro Kanno : Suppression of High Temperature Embrittlement of Al-5%Mg Alloys Containing A Trace of Sodium Caused by Antimony Addition, Scripta Materialia, Vol.37, No.8, pp.1105-1110, 1997.
  3. Keitaro Horikawa, Shigeru Kuramoto and Motohiro Kanno : Sources of a trace amount of sodium, and its effect on hot ductility of an Al-5mass%Mg alloy,Journal of Japan Institute of Light Metals, Vol.48，No.8，pp.371-374，1998.　Awarded Paper
  4. Keitaro Horikawa, Shigeru Kuramoto and Motohiro Kanno : High Temperature Embrittlement Caused by Traces of Calcium and Strontium in an Al-5%Mg Alloy, Scripta Materialia, Vol.39, No.7, pp.861-866, 1998.
  5. Keitaro Horikawa, Shigeru Kuramoto and Motohiro Kanno : Sources of a trace amount of sodium, and its effect on hot ductility of an Al-5mass%Mg alloy, Light Metals Review, Vol.7, pp.18-23, 2000.
  6. Shigeru Kuramoto, Keitaro Horikawa and Motohiro Kanno : Effect of Trace Impurities on Intergranular Fracture of Aluminum Alloys, Materials Science Forum, pp.1531-1536, 2000.
  7. Keitaro Horikawa, Shigeru Kuramoto, and Motohiro Kanno : Intergranular Fracture Caused by Trace Impurities in an Al-5.5mol%Mg Alloy, Acta Materialia, Vol.49, No.19, pp.3981-3989, 2001
  8. Kenichi Yoshida, Wang, Yuqin, Keitaro Horikawa, Kiyoshi Sakamaki, Kenji Kajiyama: Monitoring of Micro-Cracking duiring Heating of Hydrogen Doped Germanium and Silicon Single Crystals by Acoustic Emission Method, Journal of Acoustic Emission, Vol. 19, pp.22-34, 2001.
  9. Keitaro Horikawa，Kenichi Yoshida, Kiyoshi Sakamaki, Akihiro Ohmori and Ngrume Helder：Effects of excess silicon and aging condition on acoustic emission behavior of an Al-Mg-Si alloy during tensile testJournal of Japan Institute of Light Metals, Vol.52，No.2，pp.71-75，2002.　
  10. Yoshiaki Akematsu, Kenichi Yoshida, Kiyoshi Sakamaki, Keitaro Horikawa，and Mitsuhiro Nishikawa：Effects of Pinhole Shapes and Gas Pressure on Acoustic Emission Characteristics during Gas LeakJournal of The Japanese Society for Non-Destructive Inspection，Vol.51, No.7，pp.432-437, 2002.
  11. Keitaro Horikawa, Shigeru Kuramoto, and Motohiro Kanno: Reply to Comments on Intergranular Fracture Caused by Trace Impurities in an Al-5.5mol%Mg alloy, Scripta Materialia, Vol.47, No.2, pp.131-135, 2002.
  12. Keitaro Horikawa, Kenichi Yoshida and Kiyoshi Sakamaki : Acoustic emission behavior during tensile deformation and fracture of Al-Mg-Si base alloys, Materials Science Forum, pp.1405-1410, 2002.
  13. Goroh Itoh, Takayoshi Suzuki and Keitaro Horikawa : Effects of alloy composition and quenching rate on the bendability in Al-Mg-Si alloys, Materials Science Forum, pp.1193-1198, 2002.
  14. K. Horikawa and M.Kanno, Environmentally Conschiou Alloy Design, Journal of Japan Institute of Light Metals,，Vol.53,No.2, pp.82-89, 2003.　
  15. Kenichi Yoshida, Keitaro Horikawa, Kiyoshi Sakamaki and Yoshiaki Akematsu：Diagnosis of Gas Leak by Acoustic Emission, Journal of The Japanese Society for Non-Destructive Inspection，Vol.52,No.2, pp.68-72, 2003.　
  16. Keitaro Horikawa，Kenichi Yoshida, Akihiro Ohmori, Kiyoshi Sakamaki：AE Signals Caused by Environmental Embrittlement of an Al-Mg-Si Alloy Deformed at Slow Strain Rates in Laboratory Air，Journal of Japan Institute of Light Metals, Vol.53, No.4, pp.147-151, 2003.　
  17. Yoshiaki Akematsu, Kenichi Yoshida, Kiyoshi Sakamaki,and Keitaro Horikawa：AE Characteristics from A Pipe with Different Shapes during Gas Leak，Journal of The Japanese Society for Non-Destructive Inspection，Vol.52, No.10, pp.565-569, 2003.
  18. Keitaro Horikawa and Kenichi Yoshida：Visualization of Hydrogen in Tensile-Deformed Al-5%Mg Alloy by means of Hydrogen Microprint Technique with EBSP Analysis, Materials Transactions, Vol.45, No.2, pp.315-318, 2004.
  19. Kenichi Yoshida, Yoshiaki Akematsu, Kiyoshi Sakamaki and Keitaro Horikawa ：Effect of Pinhole Shape with Divergent Exit on AE Characteristics during Gas Leak, Journal of Acoustic Emission, Vol.21, pp.223-229, 2004.
  20. Keitaro Horikawa, Kenichi Yoshida, Akihiro Ohmori and Kiyoshi Sakamaki ：Acoustic Emission Caused by Environmental Embrittlement of an Al-Mg-Si Alloy, Journal of Acoustic Emission, Vol.21, pp.206-212, 2004.
  21. Keitaro Horikawaand Kenichi Yoshida：Visualization of Hydrogen in Tensile-Deformed Al-5%Mg Alloy by means of Hydrogen Microprint Technique with EBSP Analysis，Journal of Japan Institute of Metals, Vol.68,　No.12， pp.1043-1046, 2004.　Awarded Paper
  22. Kinya Ogawa, Hidetoshi Kobayashi, Fumiko Sugiyama and Keitaro Horikawa: Prediction of Mechanical Behaviour of Low Carbon Steel at High Strain-Rate Using Thermal Activation Theory and Static Data, JSME International Journal Series A, Vol.48, No.4, pp.228-233, 2005.
  23. Keitaro Horikawa，Yusuke Takeuchi，Kenichi Yoshida，and Hidetoshi Kobayashi：Hydrogen Accumulation during Fatigue Fracture of Al-Mg-Si Base Alloys，Journal of Japan Institute of Light Metals, 　Vol.56,　No.4，pp.210-213, 2006.　Awarded Paper
  24. Guang-Hong Lu, Ying Zhang, Shenghua Deng, Tianmin Wang, Masanori Kohyama,Ryoichi Yamamoto, Feng Liu, Keitaro Horikawa and Motohiro Kanno：Origin of intergranular embrittlement of Al alloys induced by Na and Ca segregation: Grain boundary weakening, Physical Review B, Vol.73, 224115, 2006.
  25. Keitaro Horikawa，Hidetoshi Kobayashi and Kenichi Yoshida：Visualization of hydrogen accumulation in fatigue-deformed Al-Mg-Si alloy Practical Microscopy Techniques for Materials Development，Japan Insitute of Metal Eds., ｐ．156, 2006.3.
  26. Keitaro Horikawa and Hidetoshi Kobayashi：Hydrogen Accumulation during Fatigue Deformation of Al-Mg-Si Base Alloys, Materials Science Forum, Vols. 519-521, pp.1053-1058, 2006.
  27. Hidetoshi Kobayashi, Masashi Daimaruya, Hiroshi Tsuda and Keitaro Horikawa: Effects of strain-rate and pre-fatigue on tensile properties of laser welded joint of high strength steel plates, Journal de Physics Ⅳ, Vol.134, pp.1175-1181, 2006.
  28. Keitaro Horikawa，Kenichiro Hioka，and Hidetoshi Kobayashi：Hydrogen Accumulation Behavior during Bending Deformation of Al-Mg-Si Alloys for Automotive Body Panels，Journal of Japan Institute of Metals,　Vol.70,　No.11，pp.890-896, 2006.　
  29. Hiroyuki Yamada，Keitaro Horikawa，and Hidetoshi Kobayashi：Effect of strain rate on hot ductility in Al-5mass%Mg alloys containing 2ppm of sodium, Journal of Japan Institute of Light Metals，Vol.57,　No.1，pp.25-29, 2007.　
  30. Keitaro Horikawa and Hidetoshi Kobayashi : Hydrogen evolution behavior in an Al-Mg-Si alloy affected by hydrogen embrittlement, Materials Science Forum, Vols. 561-565, pp.203-206, 2007.
  31. Keitaro Horikawa，Hitoshi Nishio，Hidetoshi Kobayashi and Kazuhiro Yamada：Effect of Aging Microstructure on Hydrogen Embrittlement Sensitivity in An Al-Mg-Si Alloy，Transactions of the Japan Society of Mechanical Engineers A, Vol.73，No.736，pp.1366-1374, 2007.
  32. Hidetoshi Kobayashi, Keitaro Horikawa, Yusuke Yamada, Masashi Daimaruya and Hiroshi Tsuda: Effect of pre-fatigue on dynamic and static tensile properties of lazer welded butt joints between different high strength steel plates, International Journal of Modern Physics B, Vol.22, No.9/11, pp. 1123-1128, 2008.
  33. Hiroyuki Yamada, Keitaro Horikawa and Hidetoshi Kobayashi :Impact tensile properties in Al-Mg-Si base alloys for automotive use, International Journal of Modern Physics B, Vol.22, No.9/11, pp. 1141-1146, 2008.
  34. Hidetoshi Kobayashi，Keitaro Horikawa，and Makoto Kishi：Effect of Ambient Temperature on Impact Compressive Strength of Gum Metal，Journal of The Scociety of Materials Science Japan,　Vol.57，No.8，pp.820-825，2008
  35. Hidetoshi Kobayashi and Keitaro Horikawa : Deployable Structure in Plants, Advances in Science and Technology, Vol.58, pp. 31-40, 2008.
  36. Keitaro Horikawa, Keita Yamaue and Hidetoshi Kobayashi：Effect of Continuous Hydrogen Charging on Tensile and Fatigue Properties of Ni-Zr Amorphous Alloy Membranes, Materials Transactions, Vol.49, No.10, pp.2238-2242, 2008.
  37. Keitaro Horikawa, Yoshihiko Kawabata and Hidetoshi Kobayashi：Spontaneous Bending of Ni-Ti Alloy Plates Caused by Preferential Hydrogen Absorption, Materials Transactions, Vol.49, No.10, pp.2233-2237, 2008.
  38. Hidetoshi Kobayashi, Keitaro Horikawa, Kinya Ogawa and Masahiro Hori : Impact Deformation of Thin-Walled Circular Tube Filled with Aluminum Foam in Lateral Compression, Journal of Solid Mechanics and Materials Engineering, Vol.3, No.1, pp.64-71, 2009.
  39. Keitaro Horikawa, Hiroaki Okada, Hidetoshi Kobayashi and Wataru Urushihara：Visualization of Diffusive Hydrogen in Low Alloy Steel by means of Hydrogen Microprint Technique at Elevated Temperatures, Materials Transactions, Vol.50, No.4, pp.759-764, 2009.
  40. H.Toda, T. Hidaka, M. Kobayashi, K. Uesugi, A. Takeuchi and K. Horikawa：Growth behavior of hydrogen micropores in aluminum alloys during high-temperature exposure，Acta Materialia, Vol.57, pp.2277-2290, 2009.
  41. Hidetoshi Kobayashi, Masashi Daimaruya, Hiroshi Tsuda, Keitaro Horikawa, and Kazuma Nishimura：Impact Tensile Strength of Laser Welded Joints Between Different Kinds of Steel Plates Subjected to Pre-Fatigue，Transaction of the Japan Society of Mechanical Engineers A, Vol.75, No.752, pp.455-461, 2009.
  42. Keitaro Horikawa, Hiroaki Okada, Hidetoshi Kobayashi and Wataru Urushihara：Hydrogen Permeation Estimated by HMT of Carbon Steel Exposed to Gaseous Hydrogen, Materials Transactions, Vol.50, No.9, pp.2201-2206, 2009.
  43. Keitaro Horikawa, Hiroaki Okada, Hidetoshi Kobayashi and Wataru Urushihara：Detection of Hydrogen Evolution during Tensile Deformation and Fracture in Carbon Steel, Materials Transactions, Vol.50, No.11, pp.2532-2540, 2009.
  44. Kazuhiro Tanaka，Kinya Ogawa，Hidetoshi Kobayashi，Keiko Watanabe，Shingo Yamashita and Keitaro Horikawa：Strength and Electromagnetic Phenomena in Impact Compressive and Bending Deformation of Rocks，Journal of the Society of Materials Science, Japan, 　Vol.58，No.11，pp.910-916，2009.
  45. Hiroyuki Yamada, Keitaro Horikawa and Hidetoshi Kobayashi : Effect of trace sodium on high temperature embrittlement in quasi-static and impact deformation of Al-5%Mg alloys , Materials Transactions, Vol.50, No.12, pp.2790-2794, 2009.
  46. Hiroyuki Yamada，Keitaro Horikawa，Kenichi Tanigaki and Hidetoshi Kobayashi：Impact Tensile Properties of 6061 and 7075 Aluminum Alloys Affected by Environmental Hydrogen，Transaction of the Japan Society of Mechanical Engineers A, Vol.75, No.759, pp.1630-1638, 2009.
  47. Hiroyuki Yamada，Keitaro Horikawa， and Hidetoshi Kobayashi：Effect of trace sodium on high temperature embrittlement in quasi-static and impact deformation of Al-5mass%Mg alloys，Journal of Japan Institute of Light Metals,　Vol.60,　No.1，pp.31-35，2010.
  48. Keitaro Horikawa，Hiroaki Okada，Hidetoshi Kobayashi and Wataru Urushihara：Hydrogen Permeation Estimated by HMT in Carbon Steel Exposed to Gaseous Hydrogen，Journal of Japan Institute of Metals, Vol.74,　No.3，pp.199-204，2010.
  49. Keitaro Horikawa, Hidetoshi Kobayashi and Motohiro Kanno : Hydrogen Evolution Behaviour during Tensile Deformation in Austenitic Stainless Steels Exposed to High Compressed Hydrogen Atmospheres, Materials Science Forum, Vols. 654-656, pp.2519-2522, 2010.
  50. M. Tane, T. Kawashima, H. Yamada, K. Horikawa, H. Kobayashi and H. Nakajima：Strain-rate dependence of Anisotropic Compression Behaviour in Porous Iron with Unidirectional Pores，Journal of Materials Research, Vol.25, No.6 pp.1179-1190, 2010.
  51. M. Tane, T. Kawashima, K. Horikawa, H. Kobayashi and H. Nakajima: Dynamic Compression Behavior of Lotus-type Porous Iron, Materials Science Forum, Vol. 658, pp.193-196, 2010.
  52. Keitaro Horikawa, Keita Yamaue and Hidetoshi Kobayashi：Response of Hydrogen-Induced Deformation in ZrNi Amorphous Membranes, Materials Transactions, Vol. 51, No. 12, pp.2181-2187, 2010.
  53. Keitaro Horikawa：Current sesearh trends in aluminum alloys for a high-pressure hydrogen gas container, Journal of Japan Institute of Light Metals，Vol.60, No.11, pp.542-547, 2010.　
  54. Hiroyuki Yamada，Keitaro Horikawa，Takeshi Matsumoto, Hidetoshi Kobayashi and Hidehisa Ogasawara：Hydrogen evolution behavior of tensile deformation process in 6061 and 7075 aluminum alloys，Journal of Japan Institute of Light Metals,　Vol.61,　No.7，pp.297-302，2011.
  55. Hidetoshi Kobayashi, Keitaro Horikawa, Kinya Ogawa, Keiko Watanabe and Kensuke Nozaki: Dynamic and Quasi-staic Compression Tests for Polylactic Acid Resin Foam, Materials Science Forum, Vols. 706-709, pp.745-750, 2011.
  56. Keitaro Horikawa, Hiroyuki Yamada, Masahide Mutsuo and Hidetoshi Kobayashi: Effect of Strain Rate on Hydrogen Evolution during Deformation in Al-Zn-Mg Alloys, Materials Science Forum, Vols. 706-709, pp.295-300, 2011.
  57. Keitaro Horikawa，Sota Omiya and Hidetoshi Kobayashi：Strength of rapidly solidified Al-Zn-Mg alloys imposed high-velocity impact compression，Journal of Japan Institute of Light Metals,　Vol.61,　No.9，pp.452-457，2011.
  58. Hidetoshi Kobayashi, Kinya Ogawa, Keitaro Horikawa and Keiko Watanabe: Fracture Behavior Accmpanying Electromagnetic Waves of Granite in Dynamic Three Point Bending Phenomenon，Journal of Solid Mechanics and Materials Engineering,　Vo.5, No.11, pp.873-881, 2011.
  59. Keitaro Horikawa, Nobuaki Ando, Wataru Urushihara and Hidetoshi Kobayashi：Visualization of hydrogen gas evolution during deformation and fracture in SCM440 steel with different tempering conditions，Materials Science & Engineering A,　Vol.534, pp. 495-503, 2012.
  60. Keitaro Horikawa, Hiroyuki Yamada and Hidetoshi Kobayashi：Effect of strain rate on hydrogen gas evolution behavior during tensile deformation in 6061 and 7075 aluminum alloys ，Journal of Japan Institute of Light Metals,　Vol.62，No.8，pp.306-312，2012.
  61. Hidetoshi Kobayashi, Akihumi Yoshimoto, Kinya Ogawa, Keitaro Horikawa and Keiko Watanabe: Effects of Strain Rate and Elevated Temperature on Compressive Flow Stress and Absorbed Energy of Polyimide Foam, The European Physical Journal, EPJ Web of Conferences 26, 01035 (2012) (DOI: 10.1051/epjconf/20122601035)
  62. Keitaro Horikawa, Wataru Kono, Hiroyuki Yamada and Hidetoshi Kobayashi：Suppression of grain boundary embrittlement of Al-5% Mg alloy by immersion in liquid indium，Scripta Materialia, Vol. 67, pp. 712-715, 2012. (http://dx.doi.org/10.1016/j.scriptamat.2012.06.033)
  63. Hiroyuki Yamada, Keitaro Horikawa, Hidetoshi Kobayashi and Nagahisa Ogasawara：Effect of Strain Rate on Compressive Behavior for P/M Al-Zn-Mg-Cu Alloy and its Prediction Using Thermal Activation Theory，Journal of the Japanese Society for Experimental Mechanics,　Vol. 13, Special Issue, pp. s154-s159, 2012.
  64. Keitaro Horikawa，Megumi Sadohara, Hidetoshi Kobayashi and Makoto Hino：Hydrogen Induced Bending Deformation of a Thin Plate with Electroless Pd Plating ，Journal of Japan Institute of Metals,　Vol.77，No.4，pp.115-120，2013.
  65. Hiroyuki Yamada, Nagahisa Ogasawara, Yoko Shimizu, Keitaro Horikawa, Hidetoshi Kobayashi, and Xi Chen：Effect of High Strain Rate on Indentation in Pure Aluminum，Transactions of the ASME Journal of Engineering Materials and Technology, Vol. 135, 021010, 2013.
  66. Hidetoshi Kobayashi, Fuji Okada, Kinya Ogawa, Keitaro Horikawa，and Keiko Watanabe：Strength and Temperature Increase of beta-Ti Alloy during Quasi-Static and Impact Compressive Deformation，Journal of The Society of Materials Science, Japan,　Vol.62，No.9，pp.562-568，2013.
  67. Keitaro Horikawa，Yasuhito Fujii, Hidetoshi Kobayashi and Kenji Kobayashi：Continuous observation of hydrogen release on the surface of pure iron by means of the repetition in hydrogen microprint technique ， Journal of Japan Institute of Metals,　Vol.78，No.12，pp.559-564，2013.
  68. Hiroyuki Toda, Takaaki Inamori, Keitaro Horikawa, Kentaro Uesugi, Akihisa Takeuchi, Yoshio Suzuki, and M. Kobayashi: Effect of Hydrogen Micro Pores on Mechanical Properties in A2024 Aluminium Alloys，Materials Transactions, Vol.54, No.12, pp.2195-2201, 2013.
  69. H. Toda, H. Oogo, K. Horikawa, K. Uesugi, A. Takeuchi, Y. Suzuki, M. Nakazawa, Y. Aoki and M. Kobayashi: The true origin of ductile fracture in aluminium alloy，Metallurgical and Materials Transactions A, Vol. 45, No. 2, pp 765-776, 2014.
  70. Keitaro Horikawa, Shunsuke Hokazono and Hidetoshi Kobayashi: Dyamic Observation of Hydrogen Gas Release during Crack Propagation in Al-Zn-Mg Alloy, Materials Science Forum, Vols. 783-786, pp.168-173, 2014.
  71. Iya I Tashlykova-Bushkevich, Keitaro Horikawa and Goroh Itoh: Ther role of Cr in H desorption kinetics in rapidly solidified Al, Materials Science Forum, Vols. 783-786, pp.264-269, 2014.
  72. Keitaro Horikawa, Yuki Kitani, Tomo Ogura, Makoto Takahashi, Akio Hirose and Hidetoshi Kobayashi: Point defect clusters induced by high-speed deformation and its effect on age hardening in 6061 aluminum alloys, Materials Science Forum, Vols. 794-796, pp.778-783, 2014.
  73. Hiroyuki Yamada, Masaki Tsurudome, Nagahisa Ogasawara and Keitaro Horikawa: Tensile Properties of 7075 Aluminum Alloys Subjected to Pre-fatigue in Humid Environment, Materials Science Forum, Vols. 794-796, pp.538-543, 2014.
  74. Akifumi Yosimoto, Hidetoshi Kobayashi, Keitaro Horikawa, Keiko Watanabe and Kinya Ogawa: Dynamic and Quasi-static Compressive Deformation Behaviour of Polyimide Foam at Various Elevated Temperature, Applied Mechanics and Materials, Vol. 566, pp.158-163, 2014.
  75. Masaaki Tsurudome, Hiroyuki Yamada, Nagahisa Ogasawara, Keitaro Horikawa: Effect of Pre-fatigue Deformation under Humid Environment on Impact Tensile Properties in 7075 Aluminum Alloys, Applied Mechanics and Materials, Vol. 566, pp.128-133, 2014.
  76. Yuki Kitani, Keitaro Horikawa, Kenichi Tanigaki, Hidetoshi Kobayashi, Tomo Ogura and Akio Hirose: Effect of Impact Compression on Age Hardening Behavior of Aluminum Alloys, Applied Mechanics and Materials, Vol. 566, pp.409-414, 2014.
  77. Hidetoshi Kobayashi, Keitaro Horikawa, Kinya Ogawa, Keiko Watanabe: Impact Compressive and Bending Behaviour of Rocks Accompanied by Electromagnetic Phenomena, Philosophical Transactions of the Royal Society A 372: 20130292, 2014.
  78. Tyler LeBrun, Kenichi Tanigaki, Keitaro Horikawa, and Hidetoshi Kobayashi: Strain rate sensitivity and material anisotropy of selective laser melted 17-4 PH stainless steel, Mechanical Engineering Journal, Vol.1, No.5, pp. 1-13, 2014.
  79. Keitaro Horikawa, Takuya Ogawa and Hidetoshi Kobayashi：Hydrogen behavior of SCM435 steels accompanied with environmental hydrogen embrittlement，Journal of Japan Institute of Metals, pp.89-93, 2015.
  80. Norito Nagata, Teruto Kanadani, Keiyu Nakagawa, Minoru Fukuhara, Keitaro Horikawa, Koji Murakami and Makoto Hino：Effect of Electroless Ni-P Plating on the Mechanical Properties of Al-4%Ge Alloy，Journal of Japan Institute of Metals, pp.146-150, 2015.
  81. Norito Nagata, Teruto Kanadani, Keitaro Horikawa, Koji Murakami and Makoto Hino：Effect of Surface Structure and Hydrogen on the Fatigue Strength of Electroless Nickel-Phosphorus Plated Al-2%Cu and Al-2%Zn Alloys，Journal of Japan Institute of Metals, pp.142-145, 2015.
  82. Norito Nagata, Teruto Kanadani, Keiyu Nakagawa, Minoru Fukuhara, Keitaro Horikawa, Kouji Murakami and Makoto Hino：Effect of surface structure and hydrogen on the fatigue strength of electroless nickel-phosphorus plated Al-1.2%Si alloy，Journal of Japan Institute of Metals, pp.151-155, 2015.
  83. Akifumi Yoshimoto, Hidetoshi Kobayashi, Keitaro Horikawa, Kenichi Tanigaki and Kensuke Nozaki：Effect of strain rate on compressive strength of polyimide foam，Transaction of the Japan Society of Mechanical Engineers A, Vol.81, No.824, pp.1-10, 2015.
  84. Hidetoshi Kobayashi, Noboru Konda, Joy-A-Ka Sutep, Keitaro Horikawa and Takeshi Yamauchi：Fatigue Crack Extension in Four-point Bending Test for Steels Imitated Heat Affected Zone，Journal of The Society of Materials Science, Japan, Vol.64, No.4, pp.323-329, 2015.
  85. Tyler LeBrun, Takayuki Nakamoto, Keitaro Horikawa, and Hidetoshi Kobayashi: Effect of Retained Austenite on Subsequent Thermal Processing and Resultant Mechanical Properties of Selective Laser Melted 17-4 PH Stainless Steel, Materials and Design, Vol.81, pp.44-53, 2015.
  86. Keitaro Horikawa, Yuki Kitani, Tomo Ogura, Makoto Takahashi, Akio Hirose and Hidetoshi Kobayashi: Enhanced age-hardening of an Al-Mg-Si alloy using high speed compression, Materials Transactions, Vol.56, No.7, pp.1058-1062, 2015.
  87. Hiroyuki Yamada, Masaaki Tsurudome, Nobuhiro Miura, Keitaro Horikawa, and Nagahisa Ogasawara : Ductility Loss of 7075 Aluminum Alloys Affected by Interaction of Hydrogen, Fatigue Deformation and Strain Rate, Materials Science and Engineering A, Vol.642, No.7, pp.194-203, 2015.
  88. Tomo Ogura, Keitaro Horikawa, Yuki Kitani, Mami Miara, SeongNyeong Kim, Akio Hirose, Tatsuo Sato and Hidetoshi Kobayashi : Effect of high-speed impact compression on natural aging and subsequent artificial aging of a 6061 aluminum alloy, Journal of Japan Institute of Light Metals, Vol.65, No.12, pp.617-622, 2015.
  89. Md. Shahnewaz Bhuiyan, Hiroyuki Toda, Zhang Peng, Su hang, Keitaro Horikawa, Kentaro Uesugi, Akihisa Takeuchi, Nobuto Sakaguchi, and Yoshio Watanabe : Combined microtomography, thermal desorption spectroscopy, X-ray diffraction study of hydrogen trapping behavior in 7XXX aluminum alloys, Materials Science and Engineering A, Vol.655, pp.221-228, 2016.
  90. Keitaro Horikawa, Shunsuke Hokazono and Hidetoshi Kobayashi：Synchronized Monitoring between Hydrogen Gas Release and Progress of Atmospheric Hydrogen Embrittlement in 7075 Aluminum Alloy，Journal of Japan Institute of Light Metals,　Vol.66, No.2, pp.77-83, 2016.
  91. Keitaro Horikawa, Yuka Takahashi and Hidetoshi Kobayashi：Evaluation of Hydrogen Release Routes on the Microstructure of 6061 Aluminum Alloy Surface by means of Repetition in Hydrogen Microprint Technique，Journal of Japan Institute of Light Metals,　 Vol.66, No.2, pp.84-89, 2016.
  92. Keitaro Horikawa, Tomo Ogura, Yui Miyakawa, Go Endo, Makoto Takahashi and Hidetoshi Kobayashi：Effect of High Strain Rate Deformation on Hydrogen Evolution Behavior of 6061 and 7075 Aluminum Alloys，Journal of Japan Institute of Light Metals,　 Vol.66, No.2, pp.90-94, 2016.
  93. Keitaro Horikawa, Tomo Ogura and Hidetoshi Kobayashi：Propery Enhancement Caused by High Speed Deformation in Aluminum Alloy，Journal of Japan Institute of Light Metals,　Vol.66, No.4, pp.192-199, 2016.
  94. Tomo Ogura, Keitaro Horikawa, Yuki Kitani, Mami Mihara, SeongNyeong Kim, Equo Kobayashi, Tatsuo Sato and Hidetoshi Kobayashi: Effect of high-speed impact compression on natural aging and subsequent artificial aging of a 6061 aluminum alloy, Materials Transactions, Vol.57, No.8, pp.1282-1286, 2016.
  95. Yuki Fujiwara, Kenichi Tanigaki, Keitaro Horikawa, and Hidetoshi Kobayashi: Effect of a trace of sodium on hot ductility of 5083 aluminum alloys, Journal of Japan Institute of Light Metals, Vol.66, No.8, pp.426-431, 2016.
  96. Akifumi Yosimoto, Kenichi Tanigaki, Keitaro Horikawa, Hidetoshi Kobayashi: Effects of Strain-Rate and Temperature on Mechanical Behavior of Polyimide Foam in Compression, Mechanical Engineering Journal, Vol.3, No.5, pp. 1-11, 2016.
  97. Akifumi Yosimoto, Hidetoshi Kobayashi, Keitaro Horikawa and Kenichi Tanigaki: Compressive Defoermation of Expanded Polylactic Acid Resin subjected to Quasi-static and Dynamic Loadings at Wide Temperatures, Mechanical Engineering Journal, Vol.3, No.6, pp. 1-8, 2016.
  98. Teruto Kanadani, Norihito Nagata, Makoto Hino, Koji Murakami, Keitaro Horikawa, Keiyu Nakagawa and Minoru Fukuhara: Effect of Electroless Ni-P Plating on Mechanical Properties of Al-4%Ge Alloy, Materials Science Forum, Vols. 879, pp.897-902, 2017.
  99. Gaku Kitahara, Aya Tsuji, Satoshi Asada, Tomohiro Suzuki, Keitaro Horikasa, Hidetoshi Kobayashi：Evaluation of Corrosion Rate and Diffusible Hydrogen Content of High Tensile Steel under Loading with Corrosion Environment，Zairyo to Kankyo,　Vol. 67, No.4， pp. 172-178, 2018.
  100. Hidetoshi Kobayashi, Yuya Seo, Kinya Ogawa, Keitaro Horikawa and Kenichi Tanigaki: Numerical Analysis and Experiment for Stress Wave Propagation in Two Connected Cylindrical Bodies with Different Cross-Sectional Area and Same Mechanical Impedance, The European Physical Journal, EPJ Web of Conferences, Vol. 183, No.7, 01033 (2018) (DOI: 10.1051/epjconf/201818301033)
  101. Makoto Hino, Yuto Imamura, Tessei Imaida, Hayate Ishii, Hideaki Asashita, Haruyuki Yasui, Shigeki Takago, and Keitaro Horikasa：New Proposal on Hydrogen Embrittlement of Zn-Ni Alloy Electroplated High Strength Steel, Kinzoku Hyomen Gijutsu, Vol. 69, No. 8, pp. 356-359, 2018.
  102. Hidetoshi Kobayashi, Naoki Numa, Kinya Ogawa, Keitaro Horikawa，Kenichi Tanigaki：An Attempt to Lengthen Duration of Elastic Waves Propagating in Connected Stepped Rods，Zairyo,　Vol. 67, No.11，pp.957-963， 2018.
  103. Shinnosuke Takeda, Kinya Ogawa, Kenichi Tanigaki, Keitaro Horikawa, and Hidetoshi Kobayashi: DEM/FEM simulation for impact response of binary granular target and projectile, Eur. Phys. J. Special Topics (EPJ ST), Vol.227, pp.73-83, 2018. DOI: 10.1140/epjst/e2018-00071-3
  104. Keitaro Horikawa，Yuta Hariki, Hidetoshi Kobayashi：Effects of source of hydrogen entry on hydrogen embrittlement sensitivity of Al-Zn-Mg base alloys with high amount of zinc，J. JILM,　Vol.68, No.11, pp.603-609, 2018.
  105. Gaku Kitahara, Aya Tsuji, Takashi Asada, Tomohiro Suzuki, Keitaro Horikawa, and Hidetoshi Kobayashi：Evaluation of the Corrosion Rate and Diffusible Hydrogen Content of High Tensile Steel under Loading with a Corrosion Environment, Corrosion Engineering, Vol. 67, pp. 159-166, 2018.　ISSN:0892-4228
  106. M. Hino, Y. Imamura, T. Imaida, H. Ishi, H. Asashita, H. Yasui , S. Takago and K. Horikawa：Hydrogen Embrittlement for High Strength Steel Treated with Zinc and Zinc-Nickel Alloy Eletroplating from a Sulfate Bath and Hydrogen Permeability，Hyomen Gijutsu,　Vol. 70, No.2, pp.110-114，2019.
  107. T. Okino, K. Nagata, H. Sato, K. Horikawa，H. Kobayashi：Evaluation of effect of various collision conditions on safety of occupants in the event of level crossing accident，Bulletin of the JSME, Vo.85, No.869, p. 18-00270, 2019.
  108. Gaku Kitahara, Aya Tsuji, Takashi Asada, Tomohiro Suzuki, Keitaro Horikawa, and Hidetoshi Kobayashi：Assessment of hydrogen absorption into steel during sacrificial dissolution of Zn and Zn coatings, Materials Transactions, Vol. 60, No.2, pp.306-315, 2019. (DOI: 10.2320/matertrans.M2018343)
  109. G. Kitahara, A. Tsuji, T. Asada, T. Suzuki, K. Horikawa, H. Kobayashi：Influence of Strain Rate on Fracture Characteristics and Diffusible Hydrogen of High Tensile Steel under Hydrogen Charging，Zairyo to Kankyo，Vol.68, No.2, pp.46-52，2019.
  110. Teruto Kanadani, Norihito Nagata, Keitaro Horikawa, Keiyu Nakagawa and Makoto Hino: Effects of Surface Structure and Hydrogen on the Fatigue Strength of Electroless Nickel-Phosphorus Plated Al-2%Cu Alloy, Materials Science Forum, Vol. 941, pp.1821-1826, 2018.
  111. Gaku Kitahara, Aya Tsuji, Takashi Asada, Tomohiro Suzuki, Keitaro Horikawa, and Hidetoshi Kobayashi：Assessment of hydrogen absorption into steel during sacrificial dissolution of Zn and Zn coatings, Materials Transactions, Vol. 60, No.2, pp.306-315, 2019.
  112. Keitaro Horikawa, Takuya Matsubara, and Hidetoshi Kobayashi: Hydrogen charging of Al-Mg-Si-based alloys by friction in water and its effect on tensile properties, Materials Science and Engineering A, Vol.764, No.9, 133189, 2019.
  113. K. Horikawa and H. Kobayashi, Hydrogen absorption of pure aluminum by friction of the surface in water and its effect on tensile properties，Journal of Japan Institute of Metals, 2020.　(in press) doi:10.2320/jinstmet.JB201903
  114. Keitaro Horikawa and Hidetoshi Kobayashi：Hydrogen charging of aluminum using friction in water ，Journal of Visualized Experiments, (155), e60711, doi:10.3791/60711 2020.
  115. Tomohiro Okino, Keisuke Nagata, Keitaro Horikawa and Hidetoshi Kobayashi：Evaluation method for crashworthiness of railway vehicles based on the correlation with the degree of passenger injury，Transactions of the JSME (in Japanese), Vol. 86, No.881, pp. 19-00249, 2020.
  116. R. Kido, R. Kuwano, M. Hino, K. Murayama, S Kurosaka, Y. Oda, K. Horikawa，T. Kanadani：Effects of Surface Treatment on Fatigue Property of A5052-H14 and A2017-T4 Aluminum Alloys，Journal of Japan Institute of Metals, Vol. 84, No.3, pp. 74-79, 2020.
  117. M. Hino, S. Mukai, T. Shimada, K. Okada, K. Horikawa：Effect of Baking on Hydrogen Embrittlement for High Strength Steel Treated with Various Zinc Based Electroplating from a Sulfate Bath，Journal of Japan Institute of Metals, Vol. 84, No.3, pp. 87-91, 2020.
  118. M. Hino, Y. Doi, R. Kuwano, Y. Oda, K. Horikawa：Effect of Phosphorus Content on Hydrogen Embrittlement for High Strength Steel Treated with Electroless Ni-P Plating，Journal of Japan Institute of Metals, Vol. 84, No.3, pp. 80-86, 2020.
  119. Keitaro Horikawa, Sairi Kumeuchi, Shintaro Kitahata and Hidetoshi Kobayashi：Effects of heat treatment and zirconium addition on grain boundary fracture of Al-5%Mg alloys with sodium，Journal of Japan Institute of Light MetalsVol.70, No. 4, pp.136-143, 2020.
  120. Keitaro Horikawa, Shintaro Kitahata, Sairi Kumeuchi and Hidetoshi Kobayashi：Intergranular fracture of Al-5%Mg alloys containing a high amount of sodium and its suppression by bismuth or indium additions，Materials Transactions, Vol.61, No.8, pp.1600-1606, 2020.
  121. H. Kobayashi、K. Horikawa，and K. Tanigaki：Control of Reflected Stress Waves from Connecting Part between Two Cylindrical Rods with Same Impedance，Journal of The Japan Society for Simulation Technology，Vol. 39，No.2， pp.108-116, 2020.
  122. Keitaro Horikawa, Maki Taniyama and Hidetoshi Kobayashi：Morphological observation of blisters generated in a high purity aluminum plate，Journal of Japan Institute of Light Metals, Vol.70, No.9, pp. 432-434, 2020.
  123. M. Hino, S. Mukai, T. Shimada, K. Okada,and K. Horikawa：Effect of Baking on Hydrogen Embrittlement for High Strength Steel Treated with Various Zinc Based Electroplating from a Sulfate Bath，Materials Transactions, Vol.61, No.12, pp.2302-2306, 2020.
  124. Keitaro Horikawa, Michiko Arayama and Hidetoshi Kobayashi: Quantitative detection of hydrogen gas release during slow strain rate testing in aluminum alloys, Materials Science Forum, Vol.1016, pp.568-573, 2021.
  125. M. Hino, S. Mukai, T. Shimada, K. Okada,and K. Horikawa：Influences of Baking on Hydrogen Embrittlement for High Strength Steel Treated with Various Zinc Based Electroplating，Materials Science Forum, Vol.1016, pp.156-161, 2021.
  126. R. Kido, R. Kuwano, M. Hino, K. Maruyama, S. Kurosawa, Y. Oda, K. Horikawa and T. Kanadani：Effects of Surface Treatment on Fatigue Properties of A5052-H14 and A2017-T4 Aluminum Alloys，Materials Transactions, Vol.62, No.1, pp.69-74, 2021.
  127. M. Hino, Y. Doi, Y. Oda, and K. Horikawa：Effect of Phosphorus Content on Hydrogen Embrittlement for High Strength Steel Treated with Electroless Ni-P Electroplating from a Sulfate Bath，Materials Transactions, Vol.62, No.1, pp.75-81, 2021.
  128. H. Kuwata, K. Tanigaki, M. Hino, N. Fukumuro, K. Horikawa：Effect of hydrogen on tensile properties of Ni-P plated 6061 aluminum alloys，J. JILM,　Vol.71， pp. 201-207, 2021.
  129. Keitaro Horikawa：Quantitative monitoring of environmental hydrogen embrittlement of Al-Zn-Mg-based aluminum alloys via dynamic hydrogen detection and digital image correlation，Scripta Materialia, 199 (2021) 113853
  130. K. Horikawa, M. Itoh, M. Hino, N. Fukumuro：Slow strain rate testing properties of high zinc Al-Zn-Mg-based alloys pre-compressive deformed with a high speed，J. JILM,　Vol.71，No,8, pp. 353-355, 2021.
  131. R. Shinno, M. Hino, R. Kuwano, K. Monden, M. Sato, Y. Oda, N. Fukumuro, S. Yae, K. Horikawa and T. Kanadani：Evaluation of hydrogen embrittlement of A2017-T4 aluminum alloy by rotational bending fatigue test，J. JILM,　Vol.71，No.10, pp. 450-454, 2021.
  132. K. Horikawa, M. Hino, N. Fukumuro：Improvement of resitance for hydrogen embrittlement sensitivity in aluminum alloys by means of surface modification，J. JILM,　Vol.71，No,10, pp. 456-465, 2021.
  133. R. Shinno, M. Hino, R. Kuwano, K. Monden, M. Sato, Y. Oda, N. Fukumuro, S. Yae, K. Horikawa and T. Kanadani：Effect of various electroless Ni-P plating on fatigue properties of A7075-T6511 aluminum alloy，J. JILM,　Vol.71, No.12, pp. 534-538, 2021.
  134. R. Shinno, M. Hino, R. Kuwano, K. Monden, M. Sato, Y. Oda, N. Fukumuro, and K. Horikawa, and T. Kanadani：Effect of electroless Ni-P plating on rotary bending fatigue strength of A2017-T4 aluminum alloys，Materials Transactions, Vol.63, No.6, pp.872-876, 2022..
  135. R. Shinno, M. Hino, R. Kuwano, K. Monden, K. Murayama, Y. Oda, N. Fukumuro, S. Yae, K. Horikawa and T. Kanadani： Fatigue property of electroless Ni-P plated A7075-T6511 alloy affected by plated film composition，Materials Transactions, Vol.63, 12号， pp.534-538, 2022.
  136. M. Hino, K. Kawakami, R. Kuwano, H. Kadota, M. Sato, Y. Oda, K. Horikawa，T. Kanadani：Effect of surface treatment on hydrogen embrittlement of 6061-T6 aluminum alloy, Journal of the Surface Finishing Society of Japan ,　Vol. 73, No.12, pp. 82-84, 2022.
  137. M. Hino, R. Shinno, K. Kawaue, R. Kuwano, Koji Monden, M. Sato, T. Oda, K. Horikawa and T. Kanadani：Evaluation of hydrogen embrittlement of electroless Ni-P plated 6061-T6 aluminum alloy by three-point bending and rotating bending fatigue test，Journal of Japan Institute of Metals, pp.114-119, 2023.
  138. T. Kanadani, M. Hino, K. Horikawa，N. Nagata, and K. Nakagawa：Effect of surface and hydrogen on tatigue strength of Al-4%Ge alloys Journal of Japan Institute of Metals,　Vol. 87, No.4, pp.103-107, 2023.
  139. M. Hino, T. Oda, R. Shinno, K. Kawakami K. Horikawa：Effect of microcrack on hydrogen embrittlement of Zn-Ni plated high strength steel 　Journal of Japan Institute of Metals,　Vol. 87, No.4, pp.120-124, 2023.
  140. K. Horikawa，H. Kuwata, N. Fukumuro, M. Hino: Improvement of environmetal hydrogen embrittlement of Al-Zn-Mg base alloys by means of Zinc surface plating, Journal of Japan Institute of Metals, Vol.87, No.4, pp. 108-113, 2023.
  141. K. Kawaue, M. Hino, R. Kuwano, Y. Oda, K. Horikawa and T. Kanadani：Evaluation of hydrogen embrittlement of three aluminum alloys by three-point bendind test affected by three types of plating, 　Journal of Japan Institute of Light Metals,　Vol. 87, No.5, pp.196-200, 2023.
  142. Keitaro Horikawa and Takuma Sugahara：Dynamic and quantitative measurement of hydrogen release during environmental embrittlement of Al-Zn-Mg alloys ，Journal of Japan Institute of Light Metals,　Vol. 87, No.5, pp.201-206, 2023.
  143. Keitaro Horikawa and Akio Ishii: Effect of purity on the internal morphology of blisters on aluminum surfaces, Results in Materials, Vol.21, 2024, 100522.
  144. M. Hino, R. Shinno, K. Kawaue, R. Kuwano, K. Monden, M. Sato, Y. Oda, K. Horikawa and T. Kanadani： Evaluation of hydrogen embrittlement of electroless Ni-P plated 6061-T6 aluminum alloy by three-point bending and rotating bending fatigue tests，Materials Transactions, Vol.65, No.3, pp.302-307, 2024.
  145. M. Hino, K. Ogawa, A. Asada, K. Kawaue, M. Nozaki, K. Horikawa：Effect of Nickel Co-Deposition Amount in Zn-Ni Alloy Plating on Hydrogen Embrittlement of High Strength Steel，Journal of the Surface Finishing Society of Japan ,　Vol. 75, No.5, 2024. (in press)
  146. M. Hino, R. Shinno, K. Kawaue, R. Kuwano, K. Monden, M. Sato, Y. Oda, K. Horikawa and T. Kanadani： Effect of microcracks formed in Zn-Ni alloy plating films on hydrogen embrittlement of high strength steel，Materials Transactions, Vol.65, 2024. (under review)
  147. Akio Ishii, Keitaro Horikawa, Masato Hoshino and Kentaro Uesugi: Strain field calculation through X-ray CT images by a point matching of the impurity using Voronoi diagram, Materialia, 2024, (under review).
  148. K. Kawaue, M. Hino, R. Kuwano, Y. Oda, K. Horikawa and T. Kanadani： Evaluation of hydrogen embrittlement of three aluminum alloys by three-point bending test affected by three types of plating，Materials Transactions, Vol.65, 2024. (under review)
  149. K. Horikawa, M. Hino, K. Shimizu, H. Toda, M, Hoshino and K. Uesugi: Formation of hydrogen-related pores in Ni-P-plated Al-Zn-Mg alloys revealed by syncrotron X-ray CT and hydrogen analysis, Acta Materialia, 2024, (under review).

（International Conference Proceedings）

  1. Yasuhiro Miura, Keitaro Horikawa, Kazuhiro Yamada and Masaru Nakayama； Precipitation Hardening in an Al-2.4Li-0.19Sc Alloy, Proceedings of 4th International Conference of Aluminum Alloys, No.2, pp.161-165, Atlanta, July 1994.
  2. Kenichiro Ueda, Keitaro Horikawa and Motohiro Kanno : A Small Amount of Additional Antimony on Hot Ductility of Al-5%Mg Alloys Containing a Trace Amount of Sodium, Light Metals1997 (Proc. of 36th Annual Conference of Metallurgists), Vol.2, p.507, Sudbery, Aug. 1997.
  3. Keitaro Horikawa, Shigeru Kuramoto and Motohiro Kanno : Effect of Traces of Calcium and Strontium on Hot Ductility of an Al-5.5mol%Mg Alloy, Proceedings of 6th International Conference of Aluminum Alloys, Vol.2, p1021, Toyohashi, July 1998.
  4. Keitaro Horikawa, Shigeru Kuramoto and Motohiro Kanno : Improvement of Hot Ductility in Al-Mg Base Alloys Caused by Small Amount of Additional Elements, Proceedings for the symposium Automotive Alloys 1999 from the 1999 TMS Annual Meeting & Exhibition, pp.181-192, San Diego, March, 1999.
  5. Keitaro Horikawa, Shigeru Kuramoto and Motohiro Kanno : High Temparature Embrittlement Caused by Trace Elements and Its Suppression by Additional Elements in an Al-5.5mol%Mg alloy, Light Metals 1999 (Proc. of 38th Annual Conference of Metallurgists of CIM), pp.449-462, Quebec City, Aug. 1999.
  6. Keitaro Horikawa, Kenichi Yoshida and Kiyoshi Sakamaki : High Temperature Embrittlement Caused by Trace Elements and Its Suppression by Additional Elements in an Al-5.5mol%Mg Alloy, Proc. 2nd Int. Conf. on Advanced Materials Development and Performance, pp.268-273, Tokushima, Nov. 1999.
  7. Kenichi Yoshida, Shinichi Kihara, Keitaro Horikawa and Kiyoshi Sakamaki : Evaluation of Phase Transformation Dynamics of Cu-Ai-Ni Shape Memory Alloy Single Crystal by Acoustic emission Method, Proc. 2nd Int. Conf. on Advanced Materials Development and Performance, pp.304-307, Tokushima, Nov. 1999.
  8. Masatoshi Kunisawa, Kiyoshi Sakamaki, Kenichi Yoshida and Keitaro Horikawa : Evaluation of TiN Coating Film due to Acoustic Emission, Proc. 2nd Int. Conf. on Advanced Materials Development and Performance, pp.722-725, Tokushima, Nov. 1999.
  9. Ryohei Yamashita, Kenichi Yoshida, Kiyoshi Sakamaki and Keitaro Horikawa : Acoustic Emission Behavior during Tensile Deformation of NiAl Intermetallic Compound, Proc. 2nd Int. Conf. on Advanced Materials Development and Performance, pp.912-915, Tokushima, Nov. 1999.
  10. Ryohei Yamashita, Kenichi Yoshida, Kiyoshi Sakamaki and Keitaro Horikawa : Change of Acoustic Emission Activity due to Ductility Improvement of NiAl Intermetallic Compound, Proc. 15th Int. AE Symp., Progress in Acoustic Emission X, pp.331-336, Tokyo, Sep. 2000.
  11. Kenichi Yoshida, Yu-Qin Wang, Keitaro Horikawa, Kiyoshi Sakamaki and Kenji Kajiyama : Monitoring of Microcracking during Heating Process of Hydrogen Ion Doped Germanium and Silicon Single Crystals by Acoustic Emission Method, Proc. 15th Int. AE Symp., Progress in Acoustic Emission X, pp.35-41, Tokyo, Sep. 2000.
  12. Yoshiaki Akematsu, Kenichi Yoshida, Kiyoshi Sakamaki, Keitaro Horikawa and Mitsuhiro Nishikawa: Detection and inspection of acoustic emission (AE) behavior during gas leak from a pipe, The 1st International On-Board Seminar for the Development of Environment-friendly Technology, pp.107-112, Tokushima, October 16. 2001.
  13. Keitaro Horikawa, Kenichi Yoshida and Kiyoshi Sakamaki : Acoustic emission due to the intergranular fracture of Al-Mg-Si base -alloys, Proc. of the 25th European Conference on Acoustic Emission Testing (EWGAE-2002), Vol.1, pp.239-246, Prague, Sep.11-13. 2002.
  14. Kenichi Yoshida, Keitaro Horikawa, and Kiyoshi Sakamaki : Characteristics of acoustic emission behavior during tensile deformation of Ni-Al intermetallic compounds with boron additive, Proc. of the 25th European Conference on Acoustic Emission Testing (EWGAE-2002), Vol.2, pp.287-294, Prague, Sep.11-13. 2002.
  15. Yoshiaki Akematsu, Keitaro Horikawa, Kenichi Yoshida and Kiyoshi Sakamaki :Characteristics of acoustic emission waveform during gas leak from a pipe, Proc. of the 25th European Conference on Acoustic Emission Testing (EWGAE-2002), Vol.1, pp.15-20, Prague, Sep.11-13, 2002.
  16. Keitaro Horikawa, Kenichi Yoshida and Kiyoshi Sakamaki :Acoustic Emission Accompanied by Grain Boundary Embrittlement of an Al-Mg-Si Alloy , Proc. of the 16th International Acoustic Emission Symposium (IAES-16), pp.266-273, Tokushima, Nov.12-15. 2002.
  17. Yoshiaki Akematsu, Kenichi Yoshida, Keitaro Horikawa and Kiyoshi Sakamaki :Effects of pinhole shapes with a divergent exit on AE characteristics during gas leak , Proc. of the 16th International Acoustic Emission Symposium (IAES-16), pp.319-324, Tokushima, Nov.12-15. 2002.
  18. Kenichi Yoshida, Keitaro Horikawa and Kiyoshi Sakamaki :Effect of boron additives on acoustic emission bahavior during tensile deformation of Ni-Al intermetallic compounds , Proc. of the 16th International Acoustic Emission Symposium (IAES-16), pp.15-22, Tokushima, Nov.12-15. 2002.
  19. Keitaro Horikawa and Kenichi Yoshida； Hydrogen Microprint with EBSP Analysis in Tensile-deformed Al-5%Mg Alloy, Proc. of 9th International Conference on Aluminum Alloys, pp.746-750, Brisbane, Aug.2-5, 2004. IMPRESSIVE POSTER PRESENTATION AWARD
  20. Keitaro Horikawa, Hidetoshi Kobayashi, Yusuke Takeuchi and Kenichi Yoshida : Acoustic Emission of Fatigue-deformed Aluminium Alloys for Automotive Panels, Proc. of the 26th European Conference on Acoustic Emission Testing (EWGAE-2004), pp315-322, Berlin, Sep.15-17, 2004.
  21. Hidetoshi Kobayashi, Keitaro Horikawa and Yoshinori Morita: Mechanical Investigation concerning Unfolding of Lilly Flower, Proc. of the 3rd Asian Pacific Conference on Biomechanics (AP Biomech 2007), Tokyo, Dec.S85, 2007.
  22. Keitaro Horikawa,Yoshihiko Kawabata and Hidetoshi Kobayashi : Detection of hydrogen evolution during tensile deformation of a Ti-Ni alloy affected by hydrogen embrittlement, Proc. of the 11th World Conference on Titanium (JIMIC5), Vol.2, pp.1229-1232, Kyoto,June 3-7, 2007.
  23. Hidetoshi Kobayashi, Keitaro Horikawa and Yoshinori Morita: Unfolding of Potato Flower as a Deployable Structure, Proc. of the 6th International Conference on Computation of Shell and Spatial Structures (IASS-IACM 2008), New York, May. 28-31 , 2008.
  24. Hidetoshi Kobayashi and Keitaro Horikawa: Deployable Structure in Plants, Proc. of　3rd Conference of Smart Materials, Structures and Systems, Acireale, Italy, June8-13 , 2008.
  25. Keitaro Horikawa, Hiroyuki Yamada, Kenichi Tanigaki, and Hidetoshi Kobayashi: Effect of environmental hydrogen on impact tensile properties of 6061 and 7075 aluminum alloys, Proc. of the 11th International Conference on Aluminum Alloys (ICAA11), Aachen, Sept. 22-26, Vol. 2, pp, 1436-1442, 2008.
  26. Hiroyuki Yamada, Keitaro Horikawa and Hidetoshi Kobayashi: Effect of strain rate on high temperature embrittlement in Al-5mass%Mg alloys containing traces of sodium, Proc. of the 11th International Conference on Aluminum Alloys (ICAA11), Aachen, Sept. 22-26, Vol. 2, pp, 1429-1435, 2008.
  27. Hidetoshi Kobayashi, Keitaro Horikawa Masahiro Hori and Kinya Ogawa: Impact Lateral Compression Test of Thin-Walled Circular Tube Filled with Aluminum Foam, Proc. of ICM&P2008, Chicago, CD-ROM [MSEC_ICM&P2008-72095], 2008.
  28. Keitaro Horikawa,Hiroyuki Yamada, Kenichi Tanigaki, Hidetoshi Kobayashi and Masashi Daimaruya: Visualization of Hydrogen Accumulation during Impact Deformation and Fracture of Aluminum Alloys, Proc. of ICM&P, CD-ROM [MSEC_ICM&P2008-72058], 2008, Chicago, 2008.
  29. M. Tane, T. Kawashima, K. Horikawa, H. Kobayashi and H. Nakajima: High Strain Rate Compression Behaviour of Porous Iron with Directional Pores, Proc. EUROMAT, 2009.
  30. K. Watanabe, K. Ogawa, K. Tanaka, H. Kobayashi and K. Horikawa: Electromagnetic phenomena associated with dynamic deformation and fracture of rocks, Proc. 9th International DYMAT Conference, DYMAT2009 Vol.1/2, pp.757-763, 2009.
  31. Keitaro Horikawa, Hiroyuki Yamada, and Hidetoshi Kobayashi : Visualization of Hydrogen during Tensile or Fatigue Deformation of Aluminum Alloys, Proc. of EIGHTEENTH International Symposium on PROCESSING AND FABRICATION OF ADVANCED MATERIALS [PFAM XVIII] December 12-14, Sendai, JAPAN, Vol. 1, pp, 109-118, 2009. INVITED PAPER
  32. M. Tane, T. Kawashima, K. Horikawa, H. Kobayashi and H. Nakajima: Dynamic Compression Behavior of Lotus-type Porous Iron, Proc. International Symposium on Eco-materials Processing and Design (ISEPD2010), Osaka, 2010.
  33. Keitaro Horikawa, Hidetoshi Kobayashi, and Motohiro Kanno : Hydrogen Evolution Behaviour during Tensile Deformation in Austenitic Stainless Steels Exposed to High Compressed Hydrogen Atmospheres, The 7th Pacific Rim International Conference on Advanced Materials and Processing, Cairns, Australia, August 1-5, 2010.
  34. Keitaro Horikawa, Hiroyuki Yamada, and Hidetoshi Kobayashi: Hydrogen Evolution during Fatigue Deformation in 6061 and 7075 Aluminum Alloys, Proc. of the 12th International Conference on Aluminum Alloys (ICAA12), Yokohama, Sept. 5-9, pp, 371-376,　2010 .
  35. Hidetoshi Kobayashi, Kensuke Nozaki, Keitaro Horikawa, and Keiko Watanabe: Strain-Rate Sensitivity of Plant-Delivered Polylactic Acid Resin Foam in Compression, Proc. of ISIE2010, Warsaw, 2010.
  36. Hidetoshi Kobayashi, Kinya Ogawa, Keiko Watanabe and Keitaro Horikawa: Effect of Loading Rate in Three Point Pending Tests for Rock on Its Fracture Behaviour and Accompanying Electromagnetic Phenomenon, Proc.JSME/ASME 2011 International Conference on Materials and Processing, ICM&P2011, Oregon, 2011.
  37. Hidetoshi Kobayashi, Keitaro Horikawa, Kinya Ogawa, Keiko Watanabe and Kensuke Nozaki: Dynamic and Quasi-staic Compression Tests for Polylactic Acid Resin Foam, Proc. of Thermec 2011 (International Conference on Processing & Manufacturing of Advanced Materials), Quebec City, 2011. INVITED PAPER
  38. Keitaro Horikawa, Hiroyuki Yamada, Masahide Mutsuo and Hidetoshi Kobayashi: Effect of Strain Rate on Hydrogen Evolution during Deformation in Al-Zn-Mg Alloys, Proc. of Thermec 2011 (International Conference on Processing & Manufacturing of Advanced Materials), Quebec City, 2011. INVITED PAPER
  39. Keitaro Horikawa and Hidetoshi Kobayashi: Effect of impact compression on the age-hardening of rapidly solidified Al-Zn-Mg base alloys, Proc. of the 13th International Conference on Aluminum Alloys (ICAA13), Pittsburgh, Jun. 3-7, 2012 .
  40. Hiroyuki Toda, HIdeyuki Oogo, Hideki Tsuruta, Keitaro Horikawa, Kentaro Uesugi, Akihisa Takeuchi and Masakazu Kobayashi: Origin of ductile fracture in aluminum alloys, Proc. of the 13th International Conference on Aluminum Alloys (ICAA13), Pittsburgh, Jun. 3-7, 2012 .
  41. Hidetoshi Kobayashi, Akihumi Yoshimoto, Kinya Ogawa, Keitaro Horikawa and Keiko Watanabe: Effects of Strain Rate and Elevated Temperature on Compressive Flow Stress and Absorbed Energy of Polyimide Foam, Proc. 10th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT2012 (The European Phsical Journal, EPJ Web of Conferences 26, 01035 (2012)) Freiburg, Sept. 2-7, 2012. (DOI: 10.1051/epjconf/20122601035)
  42. Hiroyuki Yamada, Nagahisa Ogasawara, Yoko Shimizu, Keitaro Horikawa and Hidetoshi Kobayashi: Effect of High Strain Rate on Micro-Indentation Test in Pure Aluminum, Proc. 10th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT2012 (The European Phsical Journal, EPJ Web of Conferences 26, 01028 (2012)) Freiburg, Sept. 2-7, 2012. (DOI: 10.1051/epjconf/20122601028)
  43. Hiroyuki Yamada, Masaki Tsurudome, Yoshimi Asano, Nagahisa Ogasawara and Keitaro Horikawa, Visualization of Hydrogen Evolution During Fatigue Deformation in 7075 Aluminum Alloy, Proceedings of 7th International Symposium on Advanced Science and Technology in Experimental Mechanics (7th ISEM' 12: ISEM-ACEM-SEM-7th ISEM' 12-Taipei), Taiwan (Taipei), 2012.
  44. Hiroyuki Yamada, Keitaro Horikawa, Hidetoshi Kobayashi, Koji Nishihara and Nagahisa Ogasawara: Effect of Strain Rate on Compressive Properties in P/M Al-Zn-Mg-Cu Alloy, Proceedings of 7th International Symposium on Advanced Science and Technology in Experimental Mechanics (7th ISEM' 12: ISEM-ACEM-SEM-7th ISEM' 12-Taipei), Taiwan (Taipei), 2012.
  45. Keitaro Horikawa, Shusuke Hokazono, Kenichi Tanigaki, and Hidetoshi Kobayashi: Detection of hydrogen release from the grain boudary fracture zone in 7075 aluminum alloy, Proc. of The 8th Pacific Rim International Conference on Advanced Materials and Processing, pp.3403-3408, Hawaii, USA, August 4-9, 2013.
  46. Masaaki Tsurudome, Hiroyuki Yamada, Nagahisa Ogasawara, Keitaro Horikawa: Effect of Pre-fatigue Deformation under Humid Environment on Impact Tensile Properties in 7075 Aluminum Alloys, Proceedings of 8th International Symposium on Impact Engineering (ISIE2013), Osaka, Sept. 2-6, 2013.
  47. Yuki Kitani, Keitaro Horikawa, Kenichi Tanigaki, Hidetoshi Kobayashi, Tomo Ogura and Akio Hirose: Effect of Impact Compression on Age Hardening Behavior of Aluminum Alloys, Proceedings of 8th International Symposium on Impact Engineering (ISIE2013), Osaka, Sept. 2-6, 2013.
  48. Akihumi Yoshimoto, Hidetoshi Kobayashi, Keitaro Horikawa, Keiko Watanabe and Kinya Ogawa: Dynamic and Quasi-static Compressive Deformation Behaviour of Polyimide Foam at Various Elevated Temperature, Proceedings of 8th International Symposium on Impact Engineering (ISIE2013), Osaka, Sept. 2-6, 2013.
  49. Kenichi Tanigaki, Ye Fei Zhang, Kinya Ogawa, Hidetoshi Kobayashi andKeitaro Horikawa: Numerical Analysis for Impact Phenomena of Projectile into Particulate Materials, Proceedings of 8th International Symposium on Impact Engineering (ISIE2013), Osaka, Sept. 2-6, 2013.
  50. Hiroyuki Yamada, Keitaro Horikawa, Hidetoshi Kobayashi, Koji Nishihara and Nagahisa Ogasawara: Effect of Strain Rate on Compressive Properties in P/M Al-Zn-Mg-Cu Alloy, Proceedings of 7th International Symposium on Advanced Science and Technology in Experimental Mechanics (7th ISEM' 12: ISEM-ACEM-SEM-7th ISEM' 12-Taipei), Taiwan (Taipei), 2012.
  51. Masaki Tsurudome, Hiroyuki Yamada, Nagahisa Ogasawara and Keitaro Horikawa: Effect of Second Phase Inclusions on Hydrogen Evolution During Fatigue Deformation in 7075 Aluminum Alloy, Proceedings of Jointed Conference on International Conference on Experimental Mechanics 2013 (ICEM 2013) and the Twelfth Asian Conference on Experimental Mechanics (ACEM12), Thailand (Bangkok), 2013.
  52. Keitaro Horikawa, Shusuke Hokazono and Hidetoshi Kobayashi: Dynamic Observation of Hydrogen Gas Release during Crack Propagation in Al-Zn-Mg Alloy, Thermec'2013 Book of Abstracts, p.245, International Conference on Processing & Manufacturing of Advanced Materials, Las Vegas, 2013. INVITED PAPER
  53. I.I. Tashlykova-Bushkevich, M. Amati, B. Aleman, L. Gregoratti, M. Kiskinova, V.G. Shepelevich and K. Horikawa: Effect of solute-lattice defect interactions on hydrogen evolution from rapidly solidified Al-Cr alloys, Proc. of the 14th International Conference on Aluminum Alloys (ICAA14), Trondheim, Norway, Jun. 15-19, 2014 .
  54. Hiroyuki Yamada, Masaki Tsurudome, Nagahisa Ogasawara and Keitaro Horikawa: Tensile Properties of 7075 Aluminum Alloys Subjected to Pre-fatigue in Humid Environment, Proc. of the 14th International Conference on Aluminum Alloys (ICAA14), Trondheim, Norway, Jun. 15-19, 2014 .
  55. Keitaro Horikawa, Yuki Kitani, Tomo Ogura, Makoto Takahashi, Akio Hirose and Hidetoshi Kobayashi: Point defect clusters induced by high-speed deformation and its effect on age hardening in 6061 aluminum alloy, Proc. of the 14th International Conference on Aluminum Alloys (ICAA14), Trondheim, Norway, Jun. 15-19, 2014 .
  56. LeBrun Tyler, Keitaro Horikawa Kenichi Tanigaki and Hidetoshi Kobayashi: Strain Rate Sensitivity and Material Anisotropy of Additive Manufactured AISI 630 Stainless Steel, Proc. of ICMP 2014, Detroit, 2014.
  57. LeBrun Tyler, Kenichi Tanigaki, Keitaro Horikawa and Hidetoshi Kobayashi: Macroscopic Alloy Segregation Resulting from the Selective Laser Melting of 17-4 PH Stainless Steel, Proc. of European Mechanics of Materials Conference, Gothenburg, Sweden, August 27-29, 2014.
  58. Peng Zhang, Hiroyuki Toda, Keitaro Horikawa, Kentaro Uesugi, Akihisa Takeuchi, Yoshio Suzuki, Nobuto Sakaguchi, Yoshio Watanabe : Hydrogen trapping behaviors in Al-Zn-Mg-Cu alloys, Proceedings for the symposium Light Metals from the 144th TMS Annual Meeting & Exhibition, Orland, USA, March 15-19, 2015.
  59. Keitaro Horikawa, Kenichi Tanigaki and Hidetoshi Kobayashi : Hydrogen visualization in the deformed microstructure of Al-Zn-Mg base alloys, Proceedings for the symposium Light Metals from the 144th TMS Annual Meeting & Exhibition, pp.341-345, Orland, USA, March 15-19, 2015.
  60. Akifumi Yoshimoto, Kenichi Tanigaki, Keitaro Horikawa, and Hidetoshi Kobayashi: The Compressive Behaviour and Constitutive Equation of Polyimide Foam in Wide Strain Rate and Temperature Range, Proc. 11th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT2015, Lugano, Switzerland, Sept. 7-11, 2015.
  61. Kenichi Tanigaki, Toru Idouji, Keitaro Horikawa, Hidetoshi Kobayashi and Kinya Ogawa: Numerical Study on Dynamic Compressive Deformation and Elasto-Plastic Wave Propagation of Foam Materials, Proc. 11th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT2015, Lugano, Switzerland, Sept. 7-11, 2015.
  62. A. Yoshimoto, K. Horikawa, H. Kobayashi, and K. Tanigaki: Compressive Deformation of Expanded Polylactic Acid Resin Subjected to Quasi-Static and Dynamic Loadings at Wide Temperatures, Proc. International Conference on Advanced Technology in Experimental Mechanics, ATEM2015, Toyohashi, Oct. 4-8, 2015.
  63. K. Tanigaki, T. Ishida, K. Horikawa, H. Kobayashi: Shock Synthesis of Hexagonal Diamond Using Single-Stage Powder Gun, Proc. International Conference on Advanced Technology in Experimental Mechanics, ATEM2015, Toyohashi, Oct. 4-8, 2015.
  64. Hidetoshi Kobayashi, Keitaro Horikawa, Takeshi Yamauchi: Mechanical Consideration for Leaf of Santa Cruz water lily, 26th International Conference on Adaptive Structures and Technologies (ICAST2015), Kobe, Oct.14-16, 2015. (Invited)
  65. Hidetoshi Kobayashi, Takeshi Yamauchi, Keitaro Horikawa, Hirokatsu Aramaki: A Study of Lily Flower Bud from Mechanical Point of View, Engineering Neo-Biomimetics Ⅵ, Kyoto, Oct.22, 2015.
  66. Hidetoshi Kobayashi, Keitaro Horikawa, Nakamichi Tominaga, Takeshi Yamauchi: Geometry in Closing Motion of Leaflet of Sensitive Plant (Mimosa Pudica), 8th Plant Biomechanics International Conference, Nagoya, Nov.30 - Dec. 4, 2015.
  67. Keitaro Horikawa, Tomo Ogura, and Hidetoshi Kobayashi : Strain Rate Dependency on Pre-deformation for Age-hardening in an Al-Mg-Si Alloy, Proc. of 24th International Symposium on Processing and Fabrication of Advanced Materials [PFAM 24] December 18-20, Osaka, JAPAN, 2015.
  68. Yui Miyakawa, Keitaro Horikawa, Tomo Ogura, and Hidetoshi Kobayashi : Effects of High-speed Compression on Hydrogen Desorption Behavior in 6061 and 7075 Aluminum Alloys, Proc. of 24th International Symposium on Processing and Fabrication of Advanced Materials [PFAM 24] December 18-20, Osaka, JAPAN, pp.280-286, 2015.
  69. Go Endo, Keitaro Horikawa, Tomo Ogura, Kenichi Tanigaki, and Hidetoshi Kobayashi : Effects of High-speed Compression on Age Hardening Behavior of A 7075 Aluminum Alloy, Proc. of 24th International Symposium on Processing and Fabrication of Advanced Materials [PFAM 24] December 18-20, Osaka, JAPAN, pp.297-303, 2015.
  70. Hidetoshi Kobayashi, Keitaro Horikawa, Kenichi Tanigaki, and Kinya Ogawa: Impact Compressive Fracture of Synthetic Quartz Accompanied by Electro-magnetic Phenomenon, Proceedings of 9th International Symposium on Impact Engineering (ISIE2016), Tainan, Sept. 5-9, 2016.
  71. Shinnosuke Takeda, Kinya Ogawa, Kenichi Tanigaki, Keitaro Horikawa, and Hidetoshi Kobayashi: DEM/FEM Simulations of Dynamic Response of Projectile Penetrating into Granular Medium, Proceedings of 9th International Symposium on Impact Engineering (ISIE2016), Tainan, Sept. 5-9, 2016.
  72. Yuya Seo, Kenichi Tanigaki, Keitaro Horikawa, Hidetoshi Kobayashi, and Kinya Ogawa : Examination of Resistant Method of Reflected Wave in Elastic Body, The 10th Asia-Pacific Conference on Fracture and Strength (APCFS2016), Toyama, Sep. 19-22, 2016.
  73. Keitaro Horikawa Kenichi Tanigaki and Hidetoshi Kobayashi: Microstructural evolution in aluminum alloys caused by high-speed deformation, Proc. of ICMP 2017, 04-08 June 2017, Los Angels, USA, 2017.
  74. Yuya Seo, Kinya Ogawa, Kenichi Tanigaki, Keitaro Horikawa, and Hidetoshi Kobayashi: Propagation Behavior of Stress Waves in Two Connected Elastic Bodies with Mechanical Impedance Matching, Proc. of ICMP 2017, 04-08 June 2017, Los Angels, USA, 2017.
  75. Keitaro Horikawa and Hidetoshi Kobayashi: Detection of Hydrogen Gas Release from Aluminum Alloys during Deformation, Proc. of FiMPART, Bordeaux, France, 2017. INVITED SPEAKER
  76. Keitaro Horikawa: Recent Topics on the Study of Hydrogen Embrittlement in Metals for Hydrogen Energy Systems, Proc. of the 2nd Symposium on Failure Analysi and Inspection for Materials and Products of ASEAN Countries, 16-18 Aug. 2017, Bangkok, Thailand, pp, 1-5, 2017. KEYNOTE SPEAKER
  77. Keitaro Horikawa, Shintaro Kitahata and Hidetoshi Kobayashi: Grain Boundary Fracture of Al-Mg Base Alloys Containing Traces of Sodium, Prof. Conference of Metallurgists, COM2017, Vancouver, Canada, 2017.
  78. Takuya Matsubara, Keitaro Horikawa, Kenichi Tanigaki and Hidetoshi Kobayashi: Hydrogen Introduction to 6061 Aluminum Alloy by Friction in Water and Its Effect on Mechanical Properties, Proc. of the 16th International Conference on Aluminum Alloys (ICAA16), Montreal, Canada, Jun. 17-22, 2018.
  79. Sairi Kumeuchi, Keitaro Horikawa, Kenichi Tanigaki and Hidetoshi Kobayashi: Effects of Sodium and Zirxonium on Intergranular Embrittlement of Al-5%Mg alloys, Proc. of the 16th International Conference on Aluminum Alloys (ICAA16), Montreal, Canada, Jun. 17-22, 2018.
  80. Hidetoshi Kobayashi, Yuya Seo, Kinya, Ogawa, Keitaro Horikawa, Ken-ichi Tanigaki: Numerical Analysis and Experimental for Stress Wave Propagation in Two Connected Cylindrical Bodies with Different Cross-Sectional Area and Same Mechanical Impedance, Proc. 12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT2018, France, Sept. 9-14, 2018.
  81. Hidetoshi Kobayashi, Kinya Ogawa, Kenichi Tanigaki, Keitaro Horikawa: A new method to lengthen duration of tensile wave using extended rods with impedance matching, Proceedings of International Symposium on Impact Engineering 2019 (ISIE2019), Gmunden, Austria, July. 2-5, 2019.
  82. Keitaro Horikawa, Michiko Arayama and Hidetoshi Kobayashi: Quantitative detection of hydrogen gas release during slow strain rate testing in aluminum alloys, Thermec'2020, International Conference on Processing & Manufacturing of Advanced Materials, Vienna, 2020. INVITED PAPER
  83. Makoto Hino, Shunsuke Mukai, Takehiro Shimada, Koki Okada, Keitaro Horikawa: Influences of Baking Time on Hydrogen Embrittlement for High Strength Steel Treated with Various Zinc Based Electroplating, Thermec'2020, International Conference on Processing & Manufacturing of Advanced Materials, Vienna, 2020.
  84. Keitaro Horikawa and Hidetoshi Kobayashi: Detection of hydrogen gas release from aluminum alloys during deformation under ordinary pressure, Proc. of the 17th International Conference on Aluminum Alloys (ICAA17), Grenoble, France, Jun. 14-18, 2020.
  85. Keitaro Horikawa: Strain rate effect on hydrogen behavior in aluminum alloys during deformation, 32nd Canadian Materials Science Coference, June. 2-4, 2021. (Invited)
  86. Keitaro Horikawa and Takuma Sugawara: Dynamic and quantitative measurement of hydrogen release during environmental embrittlement of aluminum alloys , Proc. of the 18th International Conference on Aluminum Alloys (ICAA18), Toyama, Sept. 4-8, 2022.
  87. Takahiro Sakata and Keitaro Horikawa: Dynamic measurement of hydrogen release of 5083 aluminum alloys accompanied with dynamic strain aging, Proc. of the 18th International Conference on Aluminum Alloys (ICAA18), Toyama, Sept. 4-8, 2022.
  88. Keitaro Horikawa and Takuma Sugahara: Dynamic and quantitative measurement of hydrogen release during environmental embrittlement of aluminum alloys , Proc. of the 18th International Conference on Aluminum Alloys (ICAA18), Toyama, Sept. 4-8, 2022. (Invited)
  89. Kota Kawaue, Ryohei Shinno, Ryoichi Kuwano, Makoto Hino, Yukinori Oda, Keitaro Horikawa, and Teruto Kanadani: Effects of various platings on fatige properties of A2017-T4 aluminum alloy, Proc. of the 18th International Conference on Aluminum Alloys (ICAA18), Toyama, Sept. 4-8, 2022.
  90. Makoto Hino, Ryohei Shinno, Ryoichi Kuwano, Yukinori Oda, Keitaro Horikawa, and Teruto Kanadani: Evaluation of Hydrogen Embrittlement for Aluminum Alloys by Fatigue Testing, Proc. of the 18th International Conference on Aluminum Alloys (ICAA18), Toyama, Sept. 4-8, 2022.
  91. Keitaro Horikawa, Makoto Hino, Kazuyuki Shimizu, Hiroyuki Toda, Masato Hoshino and Kentaro Uesugi: 3D measurement of internal microstructures of Al-Zn-Mg based alloy with Ni-P plating by means of synchrotron X-ray CT , Proc. of The Advanced Technology in Experimental Mechanics and International DIC Society Joint Conference 2023, Fukui, Oct.9-11, 2023.
  92. Keitaro Horikawa, Makoto Hino, Kazuyuki Shimizu, Hiroyuki Toda, Masato Hoshino and Kentaro Uesugi: 3D microstructural analysis of electroless Ni-P-plated Al-Zn-Mg alloys by means of synchrotron X-ray CT and dynamic hydrogen detection , Proc. of The 11th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 11, Jedu, Nov.11-23, 2023 KEYNOTE SPEAKER
  93. Keitaro Horikawa, Makoto Hino, Kazuyuki Shimizu, Hiroyuki Toda, Masato Hoshino and Kentaro Uesugi: 3D observation of hydrogen-related pores in surface-modified Al-Zn-Mg alloys using synchrotron X-ray CT, Proc. of The 19th International Conference on Aluminum Alloys, ICAA19, Atlanta, June 21-26, 2024.

（Reports, Letters）

  1. M. Kanno, H. Okada, G. Itoh, K. Horikawa，R. Chikaizumi and M. Matsumoto：Detection of Gasses Evolved from Materials during Deformation，Journal of Gradate School, Faculty of Engnerring, University of Tokyo, Vol.A33，pp.54-55，Jan. 1995．
  2. Keitaro Horikawa，Kenichi Yoshida and Kiyoshi Sakamaki：Evaluation of Materials Properties of Aluminum Alloys for Automotive Body Panels,Bulletin of Faculty of Engineering, the University of Tokushima,No.48, p.3, 2003,
  3. Keitaro Horikawa, and Goroh Itoh：Tensile Properties of T4-treated Al-Mg-Si alloys，Branch Researh Committees Report, Japan Institure of Light Metals, Materials Properties near Grain Boundaries in Aluminum Base Alloys,　No.48,　pp.58-67, 2003 .
  4. Goroh Itoh and Keitaro Horikawa：Bendability of T4-heated Al-Mg-Si Alloy Plate，Branch Researh Committees Report, Japan Institure of Light Metals, Materials Properties near Grain Boundaries in Aluminum Base Alloys, No.48, pp.53-58, 2003.
  5. Kei Ohyama, Hitoshi Takagi, Kazuya Kusaka, Keitaro Horikawa：The Content and Effects of Machine Creation Laboratory Using Lego Mindstorms,Journal of Japanese Society for Engineering Education, No.52, No.2, pp.20-24, 2004
  6. Hiroyuki Yamada，Keitaro Horikawa, and Hidetoshi Kobayashi：Effect of Alloy Composition on Impact Tensile Properies in Al-Mg-Si Alloys，，Branch Researh Committees Report, Japan Institure of Light Metals, Materials Properties in Aluminum Alloys with Intermediate Strength No.51, pp.33-41　2008
  7. Keitaro Horikawa：Impact Tensile Properties in Aluminum Alloy with Hydrogen Charging from Testing Environment, JSMS Committee on Impact report in 2009, pp.25-31, 2010.
  8. Keitaro Horikawa：Behavor of Hydrogen Absorption and Generation in Pure Titanium via Surface Modification, Titanium Japan 2021, pp.243-247, 2021.

（Patent）

  • High Strength Aluminum Alloy：Japanese Patent, H10-204568,(1998)
  • Actuator：Japanese Patent, 2008-215366，(2008)

（Awards）

  • Best Presentation Award, Japan Insitute of Light Metals, 2004
  • Best Presentation Award, Japan Insitute of Light Metals, 2005
  • Best Presentation Award, Japan Insitute of Light Metals, 2006
  • Light Metal Paper-by-Newcomer Prize, Japan Institute of Light Metals, ，1999
  • Light Metal Encouragement Prize, Japan Institute of Light Metals，2003
  • Impressive Poster Presentation Award，ICAA9，2004
  • Young Best Paper Award, Japan Institute of Metals, ，2004
  • Light Metal Paper Prize, Japan Institute of Light Metals，，2006
  • Kansai Award, Kansai Branch, Japan Insitutute of Light Metals, , 2011
  • Light Metal Advancement Prize, Japan Institute of Light Metals, ，2012
  • Awarded by the President in Osaka University，2013
  • Encouragement Prize from the President in Osaka University，2013.8
  • Encouragement Prize from the President in Osaka University，2014.7
  • Research & Development Encouragement Award, Chugoku Shikoku Branch, Japan Insitutute of Light Metals, 2015.7
  • Academic Contribution Award (70th Memorial years), Japan Insitutute of Light Metals, 2021. 11
  • Light Metal Contribution Award，Japan Insitutute of Light Metals, 　2022.5

（Domestic Conference）

  • More than 340 times (1993-2023)

    • （Invited Lectures or Presentations）

    1. K. Horikawa, K. Yoshida and K. Sakamaki：AE accompanied by deformation and fracture of 6000 series aluminum alloys, Chugoku-Shikoku Branch, Japan Institute of Light Metals, Tokushima, 2003
    2. K. Horikawa：Intergranular Fracture Caused by Trace Impurities in Al-5%Mg Alloys、Chugoku-Shikoku Branch, The Japan Society for Technology of Plasticity, Okayama, 2003
    3. K. Horikawa：Mechanical Properties and Microstructure in Aluminum Alloys, Forum on Materials Science and Lattice Defects, Fukuoka, 2004
    4. K. Horikawa：Impurity Behavior in Aluminum Alloys, Lecture in Summer School, Kansai Branch、Japan Institute of Light Metals, Osaka, 2004
    5. K. Horikawa：The Role of Hydrogen for the Properties of Aluminum Alloys, Invited Leture, Toyohashi, 2007
    6. K. Horikawa：The Evalutation of Hydrogen Embrittlement Sensitivity of Aluminum Alloys by mean of Thermal Desorption and Mass Spectrometry, hugoku-Shikoku Branch, Japan Institute of Light Metals, Invited Lecture, Okayama, 2007
    7. K. Horikawa：Effect of Aging Microstructure on Hydrogen Embrittlement Sensitivity in Al-Mg-Si Base Alloys, Symposium in Japan Institute of Light Metals，Ehime、2008
    8. K. Horikawa, K. Yamaue, K. Watanabe and H. Kobayashi：Hydrogen-induced Deformation of Metallic Materials Sangaku-Koryu Kai, Osaka University, Osaka、2008.
    9. K. Horikawa：Hydrogen Gas Evolution during Deformation and Fracture in Aluminum Alloys, Lecture in Summer School, Kansai Branch、Japan Institute of Light Metals, Osaka, 2009.
    10. K. Horikawa：Impact Tensile Properties of Aluminum Alloys with Hydrogen Charging from Testing Environment, Research Committee on Impact 117th Meeting, Toyohashi, 2009
    11. K. Horikawa：Recent topics on the study of hydrogen embrittlement in metallic materials for hydrogen energy systems、INVITED LECTURE, Andong University and KRISS, Korea, 2009
    12. K. Horikawa：Hydrogen Behavior in Aluminum Alloys with Deformation, ISIJ, Invited Talk on Resarch Groug in Hydrogen Embrittlement Research in Steels, 2010./FONT>
    13. K. Horikawa：Aluminum Alloy Development with High Relative Strength and High Resistance for HES、Japn Aluminum Associateion, Research Salon, Tokyo, 2011
    14. K. Horikawa：Increment of Mechanical Properties of Aluminum Alloys by means of Impact Compression, Japn Aluminum Associateion, Research Salon, Tokyo, 2012
    15. K. Horikawa：Detection of Hydrogen Evolution from the Metallic Materials, 112 th JIM & ISIJ joint research meeting、Okayama, 2012.
    16. K. Horikawa：Transportation of Hydrogen with an Aid of Dislocations, ISIJ Reserch Group Meeting on Hydrogen Embrittlment Stduy in Steels, Review, Tokyo, 2012.
    17. K. Horikawa：High Resolution Analysis of Gas Elements Evolved at the Moment of Frature, Kansai Branch, JSTP Osaka, 2013
    18. K. Horikawa：The Formation of Lattice Defects and Its Effect on Materials Properties, The Japan Aluminum Association, Oita, 2013.
    19. K. Horikawa：The Behavior of Trace Impurities Affecting the Properties of Aluminum Alloys, Sumitomo Light Metal Co. Ltd., Invited Lecture, 2013

    （History for Visiting Abroad）

    1. ICAA5(Grenoble, France), 1996.7
    2. CIM(Sudbery, Canada)、1997.8
    3. TMS(San Diego, USA)、1999.3
    4. CIM(Quebec, Canada)、1999.8
    5. ICAA8(Cambridge, UK)、2002.7
    6. EWGAE2002（Prague, Czech）、2002.9
    7. ICAA9(Brisbane, Australia)、2004.8
    8. EWGAE2004（Berlin, Germany）, 2004.9
    9. ICAA10(Vancouver, Canada)、2006.7
    10. ISIE2007(Daejeon, Korea), 2007.9
    11. PRICM6(Jedu-Do, Korea)、2007.11 INVITED SPEAKER, SESSION CHAIR
    12. ICAA11(Archen, Germany)、　2008.9
    13. ICM&P2008（Chicago, USA)、2008. 10
    14. PRICM7(Carns, Australia), 2010.8
    15. THERMEC2011(Quebec, Canada)、2011.8　INVITED SPEAKER
    16. ICAA13(Pittsburgh, USA)、2012.6
    17. PRICM8(Hawaii, USA)、2013.8
    18. THERMEC2013(Las Vegas, USA)、2013.12, INVITED SPEAKER
    19. TMS(Orland, USA)、2015.3
    20. ICM&P2017(LA, USA)、2017.6
    21. FiMPART(Boredeaux, France)、2017.7 INVITED SPEAKER, SESSION CHAIR
    22. FAIM2017(Bangkok, Thailand)、2017.8 KEYNOTE SPEAKER
    23. COM2017(Vancouver, Canada)、2017.8
    24. ICAA16(Montreal, Canada)、2018.6
    25. THERMEC2020(Vienna, Austria)、2020.6　cancelled INVITED SPEAKER
    26. ICAA18(Toyama, Japan)、2022.9 INVITED SPEAKER
    27. ATEM2023(Fukui, Japan)、2022.9
    28. PRICM2023(Jedu, Korea)、2023.11　KEYNOTE SPEAKER
    29. ICAA19(Atlanta, US)、2024.6　

    （KAKENHI Grants）

    1. Understanding of Hydrogen Embrittlement of Aluminum Alloys by means of Hydrogen Microprint Technique, H16 KAKENHI [WAKATE-B]（Representative)，2004-2006
    2. Formation of Porus Materials by means of Impact Compression, H17 KAKENHI [HOUGA]（Collaborative)，2007-2009
    3. Evalutation of Hydrogen Embrittlement Snsitivity of Materials during Impact Deformation H20 KAKENHI　[KIBAN-Ｃ]（Representative)，2008-2009
    4. Elucidation of Hydrogen Embrittlement in Hydrogen-energy Related Materials by means of Visualizing Methods, H23 KAKENHI [KIBAN-B]（Representative)，2011-2014
    5. New Functional Properties by means of Heterogeneous Structural Control in Aluminum, H23 KAKENHI [HOUGA]（Representative)，2011-2012
    6. Suppression of GB fracture of Aluminum Alloys by the Heat Treatment using Liquid Metals, H25 KAKENHI [HOUGA]（Representative)，2013-2014
    7. Functionally Gradient Aluminum Alloys Prepared by means of Atomic Diffusion from the Surface, H27 KAKENHI [HOUGA]（Representative)，2015-2016
    8. Development of New-typed Light Materials with High Strength and Ductility by means of Impact Metallurgy H28 KAKENHI [KIBAN-B]（Representative)，2016-2019
    9. In situ monitoring of hydrogen gas evlution during deformation of high-strength aluminum alloys R3 KAKENHI [KIBAN-B]（Representative)，2021-2023
    10. Dynamic analysis of hydrogen using X-ray micro-CT with hydrogen deteection: Elucidation of environmental hydroegn embrittlement R3 KAKENHI [KIBAN-B]（Representative)，2023-2026

    （Joint Research）

    1. Hydrogen Visualization by means of Hydrogen Microprint Technique, Kobe Steel Co. Ltd.，2006-2010
    2. Hydrogen Evolution Analysis under the Hydrogen Gas Atmosphere, The Japan Aluminum Association, 2008-2009
    3. Hydrogen Visualization in Carbon Steels, Sumitomo Steel, Co. Ltd., 2000-2012
    4. Analysis of Hydrogen Existence in Steels，Nippon Steel & Sumitomo Metal Co. Ltd., 2013

    （Others）

    （Essays）

    • Presentation in Conference, LM Column, Journal of Japan Institute of Light Metals, Vol.50, (2000.1), p.44.
    • Expreimental Study When I Was a PhD Student, Habataku, Materia, JIM, (2000.2), p.200.
    • How Do You Study English？ LM Column, Journal of Japan Institute of Light Metals, Vol.54, (2004), p.236.
    • Self Introduction, Between Metallurgist and Mechanical Engineer, J. JSMS, Vol.62, 8, (2013), 537.
    • Visiting at MIT, LM Column, Journal of Japan Institute of Light Metals, Vol.64, (2014.12)

    （Membership）

    • JILM
    • JIM
    • ISIJ
    • JSME
    • JSMS
    • TMS
    • CIM

    　 　　　　　　　  　

    I look forward to emails from you


    Departmenf of Mechanical Science and Bioengineering,
    Graduate School of Engineering Science, Osaka University

    【Address】
    1-3 Machikayeyama, Toyonaka, 560-8531
    TEL&FAX: +81-6-6850-6201




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