Coupled effects of grain size and orientation on properties of nanocrystalline materials
Coupled effects of grain size and orientation on properties of nanocrystalline materials
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DOI：
10.1016/j.commatsci.2012.01.021
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发表时间：
2012-06
影响因子：
3.3
通讯作者：
Ying Wang;Jianqiu Zhou;Jianqiu Zhou;T. Shen;D. Hui;Shenmin Zhang
中科院分区：
文献类型：
--
作者：
Ying Wang;Jianqiu Zhou;Jianqiu Zhou;T. Shen;D. Hui;Shenmin Zhang
本文首次提出了一种考虑晶粒尺寸和取向耦合效应的纳米晶材料弹粘塑性本构模型。在模型框架下，分析了三种不同晶粒尺寸和取向分布的情况，定量描述了尺寸和取向效应。然后对不同情况下的力学行为进行了数值模拟，以计算出晶粒尺寸和取向对纳米晶材料整体力学行为的影响。特别分析和讨论了晶粒尺寸和取向对局部剪切变形的耦合作用。
In this paper, an elastic visco-plastic constitutive model for nanocrystalline materials considering the coupled effects of grain size and orientation was proposed for the first time. In the frame work of the model, three cases of different grain size and orientation distribution were analyzed to quantitatively describe the size and orientation effects. Then numerical simulations on the mechanical behaviors of the different cases were performed to figure out the grain size and orientation effects on the overall mechanical behavior of nanocrystalline materials. Especially, the coupled effect of grain size and orientation on the local shear deformation was analyzed and discussed.