Plastic anisotropy of multi-pass caliber-rolled Mg alloy with split texture distribution
Plastic anisotropy of multi-pass caliber-rolled Mg alloy with split texture distribution
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DOI：
10.1016/j.msea.2020.139496
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发表时间：
2020-06
期刊：
影响因子：
6.4
通讯作者：
Byung Je Kwak;S. Park;Y. Moon;Jeong Hun Lee;Taekyung Lee
中科院分区：
文献类型：
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作者：
Byung Je Kwak;S. Park;Y. Moon;Jeong Hun Lee;Taekyung Lee
多道次径轧镁合金具有独特的基底织构，其具有与经受其他塑性变形工艺的合金相反的分裂基底极。纹理发展的内在本质允许各向异性的材料特性，这在这项研究中阐明。对径轧镁合金进行沿着轧制方向、横向和法向压缩，产生塑性各向异性。这些合金在压缩流动行为、变形模式和孪晶特性（在分数、活性变体和传播方面）上呈现出明显的差异。基底滑移各向同性地容纳压缩变形，而{10-12}延伸孪晶和棱柱滑移表现出取决于加载矢量的选择性激活。这种差异被解释的Schmid因子，在晶粒取向差轴分析，和几何相容性参数。
Multi-pass caliber-rolled Mg alloys possess a unique basal texture with split basal poles that are in contrast to alloys subjected to other plastic deformation processes. The intrinsic nature of texture development allows anisotropic material properties, which are elucidated in this study. Caliber-rolled Mg alloys were compressed along the rolling, transverse, and normal directions, to cause plastic anisotropy. These alloys presented distinct differences in compressive flow behaviors, deformation modes, and twinning characteristics (in terms of fraction, active variant, and propagation). The basal slip isotropically accommodated compressive deformation, whereas the {10–12} extension twinning and prismatic slip exhibited selective activation depending on the loading vector. Such disparities were interpreted in terms of the Schmid factor, in-grain misorientation axes analysis, and geometrical compatibility parameter.