Journal
SCRIPTA MATERIALIA
Volume 66, Issue 5, Pages 239-242Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.10.046
Keywords
Twinning; Strain rate; Twin variant; Magnesium alloy
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Funding
- National Basic Research Program of China (973 Project) [2007CB613703]
- Natural Science Foundation of China [50890172]
- Fundamental Research Funds for the Central Universities [CDJXS11132227]
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Twinning activities were largely enhanced under dynamic plastic deformation (DPD). {10-11}, {10-12} and {10-11}-{10-12} twins were observed when loaded along the normal direction. {10-11}-{10-12} double-twinning behavior exhibited relatively stronger orientation dependence than {10-12} twinning. When loaded along the transverse direction, {10-12} twinning was dominant under both DPD and quasi-static conditions and the variant selection mechanism was governed by the Schmid factor which is insensitive to strain rate. However, the competition between twin nucleation and twin growth can be significantly affected by the strain rate. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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