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

doi:10.1016/j.actamat.2007.12.058

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

Research output: Contribution to journal › Article › peer-review

118 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	2167-2181
Number of pages	15
Journal	Acta Materialia
Volume	56
Issue number	10
DOIs	https://doi.org/10.1016/j.actamat.2007.12.058
Publication status	Published - Jun 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/j.actamat.2007.12.058

Cite this

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title = "High-density three-dimensional mapping of internal strain by tracking microstructural features",

abstract = "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.",

author = "Masakazu Kobayashi and Hiroyuki Toda and Yuji Kawai and Tomomi Ohgaki and Kentaro Uesugi and Wilkinson, {David S.} and Toshiro Kobayashi and Yoshimitsu Aoki and Mitsuru Nakazawa",

note = "Funding Information: The SR experiment was performed with the approval of JASRI through proposal numbers 2005A0066-NM-np and 2005B0019. This work was performed as part of the Grant-in-Aid for Scientific Research from JSPS, Subject No. 17360340. The New Energy and Industrial Technology Development Organization (NEDO) supported this work as Collaborative Research of Production and Fabrication Technology Development of Aluminum useful for Automobile Light-weighting. The authors also thank the Tatematsu Foundation and the Light Metal Educational Foundation for their support.",

year = "2008",

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doi = "10.1016/j.actamat.2007.12.058",

language = "English",

volume = "56",

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AU - Kobayashi, Masakazu

AU - Toda, Hiroyuki

AU - Kawai, Yuji

AU - Ohgaki, Tomomi

AU - Uesugi, Kentaro

AU - Wilkinson, David S.

AU - Kobayashi, Toshiro

AU - Aoki, Yoshimitsu

AU - Nakazawa, Mitsuru

N1 - Funding Information: The SR experiment was performed with the approval of JASRI through proposal numbers 2005A0066-NM-np and 2005B0019. This work was performed as part of the Grant-in-Aid for Scientific Research from JSPS, Subject No. 17360340. The New Energy and Industrial Technology Development Organization (NEDO) supported this work as Collaborative Research of Production and Fabrication Technology Development of Aluminum useful for Automobile Light-weighting. The authors also thank the Tatematsu Foundation and the Light Metal Educational Foundation for their support.

PY - 2008/6

Y1 - 2008/6

N2 - 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.

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

Abstract

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