Non-destructive and three-dimensional measurement of local strain development during tensile deformation in an aluminium alloy

M. Kobayashi, H. Miura, H. Toda

研究成果: ジャーナルへの寄稿会議記事査読

抄録

Anisotropy of mechanical responses depending on crystallographic orientation causes inhomogeneous deformation on the mesoscopic scale (grain size scale). Investigation of the local plastic strain development is important for discussing recrystallization mechanisms, because the sites with higher local plastic strain may act as potential nucleation sites for recrystallization. Recently, high-resolution X-ray tomography, which is non-destructive inspection method, has been utilized for observation of the materials structure. In synchrotron radiation X-ray tomography, more than 10,000 microstructural features, like precipitates, dispersions, compounds and hydrogen pores, can be observed in aluminium alloys. We have proposed employing these microstructural features as marker gauges to measure local strains, and then have developed a method to calculate the three-dimensional strain distribution by tracking the microstructural features. In this study, we report the development of local plastic strain as a function of the grain microstructure in an aluminium alloy by means of this three-dimensional strain measurement technique. Strongly heterogeneous strain development was observed during tensile loading to 30%. In other words, some parts of the sample deform little whereas another deforms a lot. However, strain in the whole specimen was keeping harmony. Comparing the microstructure with the strain concentration that is obtained by this method has a potential to reveal potential nucleation sites of recrystallization.

本文言語英語
論文番号012030
ジャーナルIOP Conference Series: Materials Science and Engineering
89
1
DOI
出版ステータス出版済み - 8月 7 2015
イベント36th Riso International Symposium on Materials Science - Riso, デンマーク
継続期間: 9月 7 20159月 11 2015

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 工学(全般)

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