Mamoru Hayakawa
Nippon Steel
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Publication
Featured researches published by Mamoru Hayakawa.
Advanced Materials Research | 2014
Mamoru Hayakawa; Masayuki Wakita; Eisuke Nakayama
Orientation changes during fatigue crack initiation in ferrite and ferritepearlite steel were evaluated by electron backscatter diffraction (EBSD). Ferrite steel with different grain sizes and ferritepearlite steel with different carbon contents were prepared. EBSD measurements and fatigue tests were alternately performed using a small specimen. The tests on both ferrite and ferritepearlite steel suggest that the initial cracks were observed in the ferrite matrix. Thus, crystal rotation induced by fatigue in ferrite matrix is quantitatively evaluated by two misorientation parameters: grain reference orientation deviation, which is the misorientation between measuring points and the average orientation in each grain, and crystal misorientation at the same point before and after fatigue testing.
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2017
Mamoru Hayakawa; Kota Tomatsu; Eisuke Nakayama; Kazuo Okamura; Miyuki Yamamoto; Kazuyuki Shizawa
Transactions of the JSME (in Japanese) | 2014
Mamoru Hayakawa; Masayuki Wakita; Eisuke Nakayama
Transactions of Japan Society of Spring Engineers | 2018
Mamoru Hayakawa; Shinya Teramoto; Shuji Kozawa; Yutaka Neishi; Taizo Makino
The Proceedings of the Materials and Mechanics Conference | 2017
Yushi Tachibana; Hiroyuki Akebono; Masahiko Kato; Atsushi Sugeta; Takanori Kato; Yukihiko Kimura; Mamoru Hayakawa
The Proceedings of the Materials and Mechanics Conference | 2017
Mamoru Hayakawa; Yasuhiro Takase; Takayuki Saito; Kazuo Okamura; Miyuki Yamamoto; Kazuyuki Shizawa
The Proceedings of Conference of Kansai Branch | 2017
Mamoru Hayakawa; Masayuki Wakita; Eisuke Nakayama
Procedia Engineering | 2016
Mamoru Hayakawa; Eisuke Nakayama; Kazuo Okamura; Miyuki Yamamoto; Kazuyuki Shizawa
The Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2015.14 | 2015
Mamoru Hayakawa; Takayuki Saito; Eisuke Nakayama; Kazuo Okamura; Miyuki Yamamoto; Kazuyuki Shizawa
The Proceedings of the Materials and Mechanics Conference | 2014
Mamoru Hayakawa; Hiroshi Shuto; Masayuki Wakita; Eisuke Nakayama
