H
Hiroyuki Kokawa
Researcher at Shanghai Jiao Tong University
Publications - 280
Citations - 11770
Hiroyuki Kokawa is an academic researcher from Shanghai Jiao Tong University. The author has contributed to research in topics: Welding & Friction stir welding. The author has an hindex of 51, co-authored 271 publications receiving 10329 citations. Previous affiliations of Hiroyuki Kokawa include Tohoku University & Toho University.
Papers
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Journal ArticleDOI
Microstructure and properties in friction stir weld of 12Cr steel
P. Hua,S. Moronov,C. Z. Nie,Yutaka S. Sato,Hiroyuki Kokawa,Seung Hwan C. Park,Satoshi Hirano +6 more
TL;DR: In this paper, a friction stir welding was employed for joining 12Cr heat resistant ferritic steel, which was found to consist of quenched martensite with numerous fine dispersoids uniformly distributed in grain interiors.
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Growth of lead zirconate titanate thin films by hybrid processing: sol–gel method and pulsed-laser deposition
TL;DR: In this article, lead zirconate titanate (Pb(Zr x Ti 1− x )O 3 : PZT) thin films were prepared on Pt/Ti/SiO 2 /Si substrates by hybrid processing: sol-gel method and pulsed-laser deposition (PLD).
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Present status of study on development of materials resistant to radiation and beam impact
Masayoshi Kawai,Hiroyuki Kokawa,M. Michiuchi,H. Kurisihita,Takuya Goto,Masatoshi Futakawa,Toshimasa Yoshiie,Akira Hasegawa,Seiichi Watanabe,Tsutomu Yamamura,Nobuyoshi Hara,Akira Kawasaki,Kenji Kikuchi +12 more
TL;DR: In this paper, the authors described the development of intergranular corrosion (IGC)-resistant austenitic stainless steel for target vessel and window, radiation-resistant ultra-fine grained tungsten materials (W-TiC) for a solid target, CrN film on a Tungsten target by means of a molten-salt method, surface treatment of stainless steel was also observed to clarify the phenomenon of the pitting damage.
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Mechanical Properties and Microstructure of Dissimilar Friction Stir Welds of 11Cr-Ferritic/Martensitic Steel to 316 Stainless Steel
TL;DR: In this paper, the mechanical properties and microstructure of the resulting welds were examined and it was shown that friction-stir welding can produce welds between dissimilar steels that contain no macroscopic weld-defects and display suitable mechanical properties.
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Potential of grain boundary engineering to suppress welding degradations of austenitic stainless steels
TL;DR: In this paper, Annealing twins brought CSL boundaries into austenitic stainless steels and showed that the resulting steels indicated remarkably high resistance to intergranular corrosion even to weld decay and knife line attack during welding.