Etsujiro Yajima
Nagoya Institute of Technology
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Featured researches published by Etsujiro Yajima.
Materials Science and Engineering | 1988
Yoshitake Nishi; Hidehiko Harano; Hisayoshi Ishizuki; Mamoru Kawakami; Etsujiro Yajima
Abstract The change in microhardness with peening is studied for metallic glasses. The peened glass shows small Hv. If the driving force of the peening is the collision energy, a rate process may be applied for the glass. The parameter X = (Hv − Hv0)/(Hvm − Hv0), where Hvm and Hv0 are the Hv of the peened glass after an extremely long period of time and the minimum value of Hv, respectively. Based on the rate process, X is expressed by a following equation. log 10 {−1 n (1 − X)} = n log t + log k Hv approaches Hvm with peening. Hvm is 425 when the correlation coefficient is maximum. The value of Hvm agrees with the hardness value of the extremely fast liquid-quenched glass. We conclude that a given value of Hv can be obtained by controlling the cooling rate and peening time.
Materials Transactions | 1971
Toru Miyazaki; Etsujiro Yajima; Hisaaki Suga
Materials Transactions | 1974
Etsujiro Yajima; Toru Miyazaki; Toshihiko Sugiyama; Hiroo Terajima
Scripta Metallurgica | 1986
Yoshitake Nishi; Tsukuru Kai; Mikiya Tachi; Tetsuya Ishidaira; Etsujiro Yajima
Journal of The Japan Institute of Metals | 1983
Yoshitake Nishi; Hikaru Aoyagi; Etsujiro Yajima
Journal of The Japan Institute of Metals | 1970
Hisaaki Suga; Toru Miyazaki; Etsujiro Yajima
Journal of The Japan Institute of Metals | 1973
Shôitsu Seo; Toru Miyazaki; Etsujiro Yajima; Kikuo Morita
Journal of The Japan Institute of Metals | 1972
Etsujiro Yajima; Toru Miyazaki; Toshihiko Sugiyama; Hiroo Terajima
Journal of The Japan Institute of Metals | 1973
Yoshioki Kamidate; Toru Miyazaki; Etsujiro Yajima
Journal of The Japan Institute of Metals | 1971
Etsujiro Yajima; Toru Miyazaki; Takuo Itô; Masaaki Matsui
