Strain distribution visualization of punched electrical steel sheets using neutron Bragg-edge transmission imaging

Seiji Sasada, Yoshihito Takahashi, Keisuke Takeuchi, Kosuke Hiroi, Yuhua Su, Takenao Shinohara, Kenichi Watanabe, Akira Uritani

Research output: Contribution to journalArticlepeer-review

Abstract

Residual strains in a punched electrical steel sheet increase the iron loss in the steel sheet. To accurately estimate the effect of residual strain on iron loss, the residual strain distribution in a punched electrical steel sheet should be evaluated. In this study, we demonstrated the two-dimensional imaging of the residual strain distribution in a punched electrical steel sheet using the neutron Bragg-edge transmission imaging method. To improve the accuracy of strain measurement with minimal deterioration of spatial resolution, we applied a process of superposing many specimen images. The tensile strain near the punched edge and the compressive strain inside the core were experimentally confirmed using this method. Finally, the neutron Bragg-edge imaging results and those obtained from kernel average misorientation map using electron backscattered diffraction were compared to verify the validity of the proposed method.

Original languageEnglish
Article number046004
JournalJapanese journal of applied physics
Volume61
Issue number4
DOIs
Publication statusPublished - Apr 2022

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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