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arXiv · 2104.00806

Volume 78, 1 October 2014, Pages 56-64

A. Lupinacci·J. Kacher·A. A. Shapiro·P. Hosemann·A. M. Minor
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Abstract

Characterizing plasticity mechanisms below the ductile-to-brittle transition temperature is traditionally difficult to accomplish in asystematic fashion. Here, we use a new experimental setup to perform in situ cryogenic mechanical testing of pure Sn micropillars at room temperature and at 142°C. Subsequent electron microscopy characterization of the micropillars shows a clear difference in the deformation mechanisms at room temperature and at cryogenic temperatures. At room temperature, the Sn micropillars deformed through dislocation plasticity, while at142°C they exhibited both higher strength and deformation twinning. Two different orientations were tested, a symmetric (100) orientation and a non-symmetric (451) orientation. The deformation mechanisms were found to be the same for both orientations

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A. Lupinacci, J. Kacher, A. A. Shapiro, P. Hosemann, A. M. Minor. 2021-04-01. Volume 78, 1 October 2014, Pages 56-64. https://doi.org/10.1016/j.actamat.2014.06.026

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