High-density three-dimensional mapping of internal strain by tracking microstructural features

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

研究成果: Article

96 引用 (Scopus)

抜粋

The three-dimensional (3-D) strain map is useful to elucidate the relationships between microstructures and locally caused deformation and fracture. However, a robust tracking method, which enables error-free tracking in synchrotron radiation computed tomography (SR-CT) images with >10 000 microstructural features, is not currently available. In this study, a model sample was subjected to a tensile test and scanned by the SR-CT technique in order to develop a new tracking method. The developed tracking methods indicated a high tracking ratio and tracking success ratio of nearly 100% in a wide strain range, which included the assumed strain in a practical experiment. It was confirmed that tracking errors produce an incorrect strain distribution in 3-D strain mapping. This study verified the validity of the developed tracking method. The application of this method to high-resolution SR-CT images will make measurement and visualization of the strain distribution possible in three dimensions in bulk materials.

元の言語English
ページ(範囲)2167-2181
ページ数15
ジャーナルActa Materialia
56
発行部数10
DOI
出版物ステータスPublished - 2008 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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    Kobayashi, M., Toda, H., Kawai, Y., Ohgaki, T., Uesugi, K., Wilkinson, D. S., Kobayashi, T., Aoki, Y., & Nakazawa, M. (2008). High-density three-dimensional mapping of internal strain by tracking microstructural features. Acta Materialia, 56(10), 2167-2181. https://doi.org/10.1016/j.actamat.2007.12.058