Crystallographic structure study of a japanese sword masamitsu made in the 1969 using pulsed neutron imaging

Kazuma Ohmae, Yoshiaki Kiyanagi, Hirotaka Sato, Kenichi Oikawa, Anh Hoang Pham, Kenichi Watanabe, Yoshihiro Matsumoto, Takenao Shinohara, Tetsuya Kai, Stefanus Harjo, Masato Ohnuma, Shigekazu Morito, Takuya Ohba, Akira Uritani, Masakazu Ito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Energy-resolved neutron transmission imaging technique using an accelerator-driven pulsed neutron source and a time-resolved two-dimensional detector can obtain the Bragg-edge transmission spectrum at each pixel. In this technique, crystallographic information can be visualized over a wide area of a sample. We used this method to investigate the crystallographic information of a modern Japanese sword produced by Masamitsu in 1969. As a result, shifting and broadening of the (110) Bragg-edge was confirmed at the cutting-edge side. It is evidence that the martensite phase exists at the cutting-edge side as a result of the quenching process. By comparing with results of the old Japanese swords, it is found that the martensite region in the modern Japanese sword is wider or deeper than one in the old swords. In addition, we can see strongly preferred orientation of the crystal grains at the boundary between the martensite phase on the cutting-edge side and the ferrite phase on the back-edge side.

Original languageEnglish
Title of host publicationNeutron Radiography - 11th World Conference on Neutron Radiography, WCNR 2018
EditorsFilomena Salvemini, Joseph J. Bevitt
PublisherAssociation of American Publishers
Pages227-232
Number of pages6
ISBN (Print)9781644900567
DOIs
Publication statusPublished - 2020
Externally publishedYes
Event11th World Conference on Neutron Radiography, WCNR 2018 - Sydney, Australia
Duration: Sep 2 2018Sep 7 2018

Publication series

NameMaterials Research Proceedings
Volume15
ISSN (Print)2474-3941
ISSN (Electronic)2474-395X

Conference

Conference11th World Conference on Neutron Radiography, WCNR 2018
Country/TerritoryAustralia
CitySydney
Period9/2/189/7/18

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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