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

3 Citations (Scopus)

Abstract

We measured the local grain orientation gradient and dislocation density using electron backscatter diffraction (EBSD) measurement and electron channeling contrast imaging (ECCI) to obtain strain maps near a stress concentration source in pure nickel (Ni) as a face-centered cubic (FCC) model sample. In particular, we obtained the relationship amongst the grain orientation spread (GOS), dislocation density, and equivalent plastic strain on the sample surface, which were obtained by EBSD, ECCI, and digital image correlation (DIC), respectively. After obtaining the GOS-strain and dislocation density-strain relationships, the strain distribution in the interior of the sample was also determined by measuring the GOS and dislocation density, which were linearly correlated. The dislocation density-strain relationship exhibited a relatively small deviation.

Original languageEnglish
Pages (from-to)2334-2342
Number of pages9
JournalIsij International
Volume59
Issue number12
DOIs
Publication statusPublished - 2019

Keywords

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

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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