Journal
SCRIPTA MATERIALIA
Volume 99, Issue -, Pages 5-8Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2014.11.004
Keywords
In situ TEM; Orientation mapping; Dislocations; Grain growth; Grain rotation
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Funding
- French National Research Agency under the Investissement d'Avenir program [ANR-10-EQPX-38-01]
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Despite abundant literature claims of mechanisms involving grain boundaries (GB) mechanisms in the deformation of nanocrystalline metals and alloys, few are actually evidencing them. Experimentally sorting and quantifying these mechanisms adds complexity and remains a challenge. Here we report evidence and quantitative measurements of both grain growth and rotation in response to a tensile strain, in sub-micron grained aluminium thin films. The behavior of several grains was monitored during in-situ transmission electron microscopy (TEM) experiments combining tensile test and crystal orientation mapping. A custom routine was created to discriminate relative GB movements from the rigid body motion of the sample. We also provide evidence that grain rotation results from the motion of intergranular dislocations. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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