Predicting textural variability effects in the anisotropic plasticity and stability of hexagonal metals: Application to magnesium and its alloys
Predicting textural variability effects in the anisotropic plasticity and stability of hexagonal metals: Application to magnesium and its alloys
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DOI：
10.1016/j.ijplas.2020.102762
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发表时间：
2020-09
影响因子：
9.8
通讯作者：
Padmeya P. Indurkar;Shahmeer Baweja;R. Pérez;S. Joshi
中科院分区：
文献类型：
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作者：
Padmeya P. Indurkar;Shahmeer Baweja;R. Pérez;S. Joshi
这项工作使用三维计算晶体塑性方法系统地研究了六方密堆积（六方）材料中的织构属性联系。镁及其合金被视为模型系统。我们使用各种替代纹理进行全场、大应变、微机械模拟，这些替代纹理对一系列镁合金的多个实验数据集进行采样。纹理变化的作用以及变形机制对宏观塑性各向异性和强度不对称演化的相关敏感性在沿材料主方向和离轴方向的单轴拉伸和压缩载荷下进行映射。为了评估晶体塑性各向异性的作用，模拟了两个不同的材料数据集，分别代表纯镁和合金镁。这些结果为镁合金在一系列材料纹理上的实验观察结果提供了见解。我们进一步讨论了固有晶体学和结构效应引起的聚集塑性各向异性对损伤容限的潜在影响。
This work systematically investigates the texture-property linkages in hexagonal close-packed (hexagonal) materials using a three-dimensional computational crystal plasticity approach. Magnesium and its alloys are considered as a model system. We perform full-field, large-strain, micromechanical simulations using a wide range of surrogate textures that sample several experimental datasets for a range of Mg alloys. The role of textural variability and the associated sensitivity of deformation mechanisms on the evolution of macroscopic plastic anisotropy and strength asymmetry is mapped under uniaxial tensile and compressive loading along the material principal and off-axes orientations. To assess the role of crystallographic plastic anisotropy, two distinct material datasets are simulated, which represent pure and alloyed magnesium. The results provide insights into experimental observations reported for magnesium alloys over a range of material textures. We further discuss potential implications on the damage tolerance from the aggregate plastic anisotropy arising from intrinsic crystallographic and textural effects.