A constitutive model of twinning and detwinning for hexagonal close packed polycrystals
A constitutive model of twinning and detwinning for hexagonal close packed polycrystals
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DOI：
10.1016/j.msea.2012.06.038
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发表时间：
2012-10
期刊：
影响因子：
6.4
通讯作者：
Huamiao Wang;Peidong Wu;C. Tomé;Jian Wang
中科院分区：
文献类型：
--
作者：
Huamiao Wang;Peidong Wu;C. Tomé;Jian Wang
提出了一种新的描述密排六方晶系多晶材料双晶化和退双晶化的本构模型，并将其应用于新近发展的弹粘塑性自洽多晶模型中。将该模型应用于镁合金Mg-3Al-1 Zn（AZ 31 B）薄板在循环载荷和应变路径变化下的变形分析。它表明，新的孪生模型是能够捕捉到的关键功能与孪生和实验观察到的去孪生。
A new constitutive model to describe twinning and detwinning for polycrystalline materials with the hexagonal close packed (HCP) crystallographic structure is developed and implemented in the recently developed elastic viscoplastic self-consistent (EVPSC) polycrystal model. The new model is then applied to magnesium alloy Mg–3 Al–1 Zn (AZ31B) sheet under cyclic loadings and strain path changes. It is demonstrated that the new twinning model is able to capture key features associated with twinning and detwinning observed experimentally.