Papers - YOKOYAMA Ken'ichi
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Electrochemical degradation of the hydrogen-absorption-induced passive film on an Ni–Ti superelastic alloy in an NaCl solution Reviewed International journal
Seo-Young Rho, Jun-Seob Lee, Kuga Ando, Hengjie Zhu, Seung-Hoon Baek, Jae Deok Kim, Jungjae Park, Sung Kang, Ken'ichi Yokoyama
Electrochimica Acta 144022 2024.04
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Delayed fracture enhanced by martensite transformed from retained austenite in ultra-high strength steel sheet Reviewed International journal
Katsutoshi Takashima, Takamasa Nishimura, Ken'ichi Yokoyama, Yoshimasa Funakawa
ISIJ International 742 - 750 2024.04
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Changes in hydrogen states after interactions between hydrogen and stress-induced martensite transformation for Ni–Ti superelastic alloy Reviewed International journal
Ryosuke Hayashi, Ken'ichi Yokoyama
Philosophical Magazine Letters 103 ( 1 ) 2266466 2023.10
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Characterization of hydrogen thermal desorption behavior and enhancement of hydrogen embrittlement in Ni–Ti superelastic alloy induced by cathodic hydrogen charging in the presence of chloride ions Reviewed International journal
Ryosuke Hayashi, Ken’ichi Yokoyama
Shape Memory and Superelasticity 9 ( 3 ) 520 - 530 2023.09
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Inhibition of localized corrosion of Ni–Ti superelastic alloy in sodium hypochlorite solution by sodium carbonate addition Reviewed International journal
Ryosuke Hayashi, Ken’ichi Yokoyama
Shape Memory and Superelasticity 2023.06
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Inhibition of hydrogen absorption due to wear between Ni–Ti superelastic alloys in NaCl solution by H2O2 addition Reviewed International journal
Kaito Nakabachi, Ken’ichi Yokoyama
Materials Letters 324 132701 2022.10
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Continuousness of interactions between hydrogen and plastic deformation of ultra-high strength steel sheet consisting of ferrite and nanometersized precipitates Reviewed International journal
Katsutoshi Takashima, Ruoyu Han, Ken'ichi Yokoyama, Yoshimasa Funakawa
Philosophical Magazine Letters 102 ( 10 ) 324 - 334 2022.10
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Hydrogen absorption due to wear between Ni-Ti superelastic alloys in water Reviewed International journal
Kaito Nakabachi, Ken’ichi Yokoyama
Materials Letters 318 132205 2022.07
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Positron annihilation lifetime spectroscopy investigation of thermal aging effect for the mechanical properties of hydrogen-absorbed tantalum Reviewed International journal
Yasuhiro Ishijima, Ken’ichi Yokoyama, Fumiyoshi Ueno, Hitoshi Abe
Material Transactions 63 ( 4 ) 592 - 599 2022.04
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Degradation caused by self-multiplication of damage induced by an interplay between hydrogen and the martensite transformation in a Ni-Ti superelastic alloy Reviewed International journal
Naoya Yamaguchi, Ken'ichi Yokoyama
Philosophical Magazine Letters 102 ( 2 ) 60 - 70 2022.02
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Countermeasure for corrosion and hydrogen embrittlement of Ni-Ti superelastic alloy in acidic fluoride solution by adding sodium bicarbonate and hydrogen peroxide Reviewed International journal
Naoya Yamaguchi, Ken'ichi Yokoyama
Corrosion Engineering, Science and Technology 56 ( 5 ) 419 - 426 2021.03
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Compositional dependence of the apatite formation ability of Ti–Zr alloys designed for hard tissue reconstruction Reviewed International journal
Toshiki Miyazaki, Tomoya Hosokawa, Ken'ichi Yokoyama, Takanobu Shiraishi
Journal of Materials Science: Materials in Medicine 31 1 - 8 2020.11
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Marked degradation of tensile properties induced by plastic deformation after interactions between strain-induced martensite transformation and hydrogen for type 316L stainless steel Reviewed International journal
Keisuke Nicho, Ken'ichi Yokoyama
Metals 10 928 2020.07
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口腔内のフッ化物による歯列矯正用Ni-Ti超弾性合金の材質劣化とその対策 Invited Reviewed
横山賢一
日本歯科理工学会誌 39 ( 2 ) 168 - 174 2020.05
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Hydrogen embrittlement induced by hydrogen charging during deformation of ultra-high strength steel sheet consisting of ferrite and nanometer-sized precipitates Reviewed International journal
Katsutoshi Takashima, Ruoyu Han, Ken'ichi Yokoyama, Yoshimasa Funakawa
ISIJ International 2327 - 2333 2019.12
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Role of interface between ferrite and martensite in hydrogen embrittlement behavior of ultra-high strength dual-phase steel sheets Reviewed International journal
Katsutoshi Takashima, Takamasa Nishimura, Ken'ichi Yokoyama, Yoshimasa Funakawa
ISIJ International 59 ( 9 ) 1676 - 1682 2019.09
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Improved fracture properties of Ni-Ti superelastic alloy under sustained tensile load in physiological saline solution containing hydrogen peroxide by hydrogen charging Reviewed International journal
Takehiro, Shimada, Ken'ichi Yokoyama, Jun'ichi Sakai
752 1 - 7 2018.07
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Hydrogen embrittlement behavior of ultra-high strength dual phase steel sheet under sustained tensile-loading test Reviewed International journal
Katsutoshi Takashima, Yuma Yoshioka, Ken'ichi Yokoyama, Yoshimasa Funakawa
ISIJ International 58 ( 1 ) 173 - 178 2018.01
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Effect of metallographic structure and machining process on the apatite-forming ability of sodium hydroxide- and heat-treated titanium Reviewed
29 109 - 118 2018.01
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First interactions between hydrogen and stress-induced reverce transformation of Ni-Ti superelastic alloy Reviewed International journal
Ken'ichi Yokoyama, Tatsuki Hashimoto, Jun'ichi Sakai
97 ( 11 ) 459 - 468 2017.11