Journal Published Online: 29 October 2018
Volume 8, Issue 2

Study on Blade Curving Caused by Quenching of the Japanese Sword



Blade curving caused by quenching of the Japanese sword has been recognized by swordsmiths through the ages. In the late 1920s, Denzaburo Hattori noted that, based on his experimental results using cylindrical specimens, sword curving is induced not only by martensitic transformation expansion in the near-edge region but also nonuniform elastic and plastic strains distributed in this section. The presented research is an updated explanation on the subject of prepared Japanese sword (JS)-type specimens made of the same steel and by the same process as the Japanese sword, and model JS-type specimens with almost the same shape as JS-type specimens, which were machined from commercial carbon steel and austenite stainless steel bars. All specimens quenched by a swordsmith using the traditional way showed a usual curved shape with different curvatures. The curving, temperature, hardness, microstructure, and residual stress of the specimens were examined to prepare future simulation works.

Author Information

Arimoto, Kyozo
Arimotech Ltd., Kishiwada, Osaka, Japan
Iyota, Muneyoshi
Osaka Institute of Technology, Asahi-ku, Osaka, Japan
Pages: 15
Price: $25.00
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Stock #: MPC20180051
ISSN: 2379-1365
DOI: 10.1520/MPC20180051