期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2022.143856
关键词
Crystal plasticity model; Twin bands; Stress -strain curve; Magnesium
类别
资金
- National Key Research and Development Program of China [2016YFB0700103]
- key program of National Natural Science Foundation of China [12132005]
A new system of crystal plasticity finite element models is developed in this study, considering the cooperative interactions of dislocation slip and deformation twinning. The simulation results show that optimizing the twinning activation behavior can improve the plastic deformation ability.
Deformation twinning is one of the major plastic deformation modes of hexagonal metals. In this study, a new system of crystal plasticity finite element models is developed, with the cooperative interactions of dislocation slip and deformation twinning comprehensively involved. The obtained stress-strain curves for several differently-orientated Mg single crystals match well with experimental results, and the formation and thickening features of twin bands are captured. Simulation results reveal that (1) some thin twin bands are firstly formed in the shearing direction of the twinning plane, because of the much lower twinning resistance than that in the normal direction; (2) the softening and hardening of the twinning resistance play a critical role in the anisotropic mechanical response. By optimizing the twinning activation behaviors, the favorable interactions of twinning and dislocation slip can occur and the plastic deformation ability can be improved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据