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

Abstract : 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.
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https://hal.univ-lorraine.fr/hal-01503457
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Submitted on : Friday, April 7, 2017 - 10:24:34 AM
Last modification on : Wednesday, November 3, 2021 - 8:36:09 AM

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P. -A. Juan, Stéphane Berbenni, M. R. Barnett, C. N. Tome, L. Capolungo. A double inclusion homogenization scheme for polycrystals with hierarchal topologies: application to twinning in Mg alloys. International Journal of Plasticity, Elsevier, 2014, 60, pp.182-196. ⟨10.1016/j.ijplas.2014.04.001⟩. ⟨hal-01503457⟩

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