EBSD and ECCI based assessments of inhomogeneous plastic strain evolution coupled with digital image correlation

Ryohei Kakimoto, Motomichi Koyama, Kaneaki Tsuzaki

Research output: Contribution to journalArticlepeer-review

Abstract

Synopsis: We measured local grain orientation gradient and dislocation density by electron backscatter diffraction (EBSD) measurement and electron channeling contrast imaging (ECCI) to obtain strain maps near a stress concentration source in a pure nickel as a FCC model specimen. In particular, we obtained relationship among grain orientation spread (GOS), dislocation density, and equivalent plastic strain on the specimen surface, which were obtained by EBSD, ECCI, and digital image correlation (DIC), respectively. After obtaining GOS-strain and dislocation density-strain relations, the strain distribution in the specimen interior was also determined by measuring the GOS and dislocation density. Both of the GOS and dislocation density showed a linear correlation, and the dislocation density-strain relation showed a relatively small deviation.

Original languageEnglish
Pages (from-to)100-108
Number of pages9
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume105
Issue number2
DOIs
Publication statusPublished - 2019 Feb
Externally publishedYes

Keywords

  • Digital image correlation
  • Dislocation density
  • Electron backscatter diffraction
  • Electron channeling contrast imaging
  • Grain orientation spread
  • Plastic strain

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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