Three-dimensional measurement of local strain distribution by tracking microstructural features in high-resolution SR-CT image

Masakazu Kobayashi, Hiroyuki Toda, Tomomi Ohgaki, Kentaro Uesugi, David S. Wilkinson, Toshiro Kobayashi, Yoshimitsu Aoki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The local elastic and plastic strain during deformation are very complicated and different form the macroscopic strain, because most materials have inhomogeneous microstructure. In this study, local strain distribution in three dimensions has been measured using the new developed method based on image analysis in high-resolution synchrotron radiation computed tomography (SR-CT). Model and practical specimens, which made of cupper alloy and aluminum alloy, respectively, were prepared for a development procedure and application of local strain measurements. Gauging intervals of microstructural features before and after deformation gave us information of inhomogeneous local strain distribution in three dimensions. High strain was observed in a necking region appeared after tensile deformation in the model sample. A combination of non-destructive measurements by SR-CT and three-dimensional analysis revealed inhomogeneous strain distributions in practical aluminum samples.

Original languageEnglish
Pages (from-to)1153-1156
Number of pages4
JournalKey Engineering Materials
Volume345-346 II
Publication statusPublished - 2007 May 21
Externally publishedYes

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Keywords

  • Computer tomography
  • Interior strain
  • Local strain
  • Synchrotron radiation
  • Three-dimensional image analysis
  • Three-dimensional observation
  • Tracking algorithm

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kobayashi, M., Toda, H., Ohgaki, T., Uesugi, K., Wilkinson, D. S., Kobayashi, T., & Aoki, Y. (2007). Three-dimensional measurement of local strain distribution by tracking microstructural features in high-resolution SR-CT image. Key Engineering Materials, 345-346 II, 1153-1156.