Kunichika Kubota
Hitachi
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Publication
Featured researches published by Kunichika Kubota.
Materials Science Forum | 2013
Muneo Yaso; Yoshihiro Minagi; Toshifumi Takaiwa; Kunichika Kubota; Tsuyoshi Kanaizumi; Takuya Ohba; Shigekazu Morito; Taisuke Hayashi
Japanese sword has finer grain size and lath martensite in the microstructure of sharp edge amazingly. Nowadays these structures are considered to be one of the ideal structure at which are greatly aimed to strengthen or improve toughness of steels. Though the carbon content of its sharp edge is 0.70 mass %, there are no lenticular martensite and no micocracking in that area. As a result of bending test by actual sword specimen, one sword was finally bent, the other sword was broken. However it is found the sharp edge in Japanese sword has such a large bending strength 2500, 4600MPa respectively as modern, high performance tool steels and the difference of crack propagation under bending depends on the microstructure distribution and the grain size in cross section of Japanese sword.
Archive | 1994
Kunichika Kubota; Akitoshi Hiraki
Materials Transactions | 2009
Muneo Yaso; Shuhei Hayashi; Shigekazu Morito; Takuya Ohba; Kunichika Kubota; Kouji Murakami
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2008
Muneo Yaso; Shigekazu Morito; Takuya Ohba; Kunichika Kubota
Archive | 2000
Yukio Abe; Yoshihiro Kada; Kunichika Kubota; Isao Tamura; 邦親 久保田; 善裕 加田; 庸 田村; 行雄 阿部
Archive | 2009
Katsuhiko Ohishi; Toshihiro Uehara; Kunichika Kubota
Archive | 2003
Etsuo Fujita; Kunichika Kubota; Yoshiki Masugata; Yoshihiro Minagi
Wear | 2011
Kunichika Kubota; Takuya Ohba; Shigekazu Morito
Archive | 2000
Kunichika Kubota; Takehiro Ohno; Yoshiki Masugata
Archive | 2000
Kunichika Kubota; Shunichiro Matsumoto; Hideo Murata; 邦親 久保田; 英夫 村田; 俊一郎 松本
