期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 60, 期 -, 页码 182-196出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2014.04.001
关键词
Twinning; Magnesium; Micromechanics
资金
- French State through the National Research Agency (ANR) [ANR-11-LABX-0008-01]
- project MAGTWIN [ANR-12-BS09-0010-02]
- Office of basic Energy Science [FWP 06SCPE401]
- Agence Nationale de la Recherche (ANR) [ANR-12-BS09-0010] Funding Source: Agence Nationale de la Recherche (ANR)
The present work introduces a double inclusion elasto-plastic self-consistent (DI-EPSC) scheme for topologies in which crystals can contain subdomains (i.e. twins, etc.). The approach yields a direct coupling between the mechanical response of grains and their subdomains via a concentration relationship on mean fields derived from both the Eshelby and the Tanaka-Mod properties. The latent effect caused by twinning on the mechanical response is observed on both initially extruded and non-textured Mg alloys. For twinned grains, it is shown that deformation system activities and plastic strain distributions within twins drastically depend on the interaction with parent domains. Moreover, a quantitative study on the coupled influence of secondary slip activities on the material response is proposed. (C) 2014 Published by Elsevier Ltd.
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