Characteristic Feature Found in Typical TATARA Product, Japanese Sword

Free access article

Issue		ESOMAT 2009 2009


Article Number		02024
Number of page(s)		5
Section		Principles, Simulations, Materials: Background
DOI		http://dx.doi.org/10.1051/esomat/200902024
Published online		01 September 2009

ESOMAT 2009, 02024 (2009)
DOI: 10.1051/esomat/200902024

Characteristic Feature Found in Typical TATARA Product, Japanese Sword

A. K. Das¹, T. Ohba¹, S. Morito¹, G. Takami¹, T. Fujikawa¹ and M. Yaso²

¹ Department of Materials Science, Shimane University, Nishikawatsu, Matsue, 690-8504, JAPAN
² Wakoh Museum, Yasugi-cho, Yasugi 692-0011, JAPAN

ohba@riko.shimane-u.ac.jp

Published online: 1 September 2009

Abstract
Tatara is traditional iron making method developed around San-in area in Japan. Typical product of Tatara is Japanese sword, which is tough and strong and is also known as an art object. It is said that Japanese sword cannot be produced without Tatara iron. Thus microscopic observations of Japanese sword attracted researchers and were performed for example by Tawara with optical microscopy at the beginning of 1900s. Since then a few microscopic observations have been performed but not so many. A lot of knowledge of steels has been accumulated and new equipments have been also developed, which give information on atomistic scale. Thus the precise microstructural observations of Japanese sword using such as SEM/EBSD have been made and are compared with ordinary steel. The preliminary experiments indicated that the average martensite block thickness is little longer than that of ordinary steels and crystal orientation distribution is different from ordinary one.

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