A double inclusion homogenization scheme for polycrystals with hierarchal topologies: application to twinning in Mg alloys

作者：Juan P A; Berbenni S; Barnett M R; Tome C N; Capolungo L^*

来源：International Journal of Plasticity, 2014, 60: 182-196.

DOI：10.1016/j.ijplas.2014.04.001

• Twinning
• Magnesium
• Micromechanics

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.

• 出版日期2014-9