Polycrystal modeling of hot extrusion texture of AZ80 magnesium alloy

被引:12
作者
Shao, Yi-chuan [1 ]
Tang, Tao [1 ]
Li, Da-yong [1 ]
Zhou, Guo-wei [1 ]
Zhang, Shao-rui [1 ]
Peng, Ying-hong [1 ]
机构
[1] Shanghai Jiao Tong Univ, Dept Mech Engn, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China
基金
中国国家自然科学基金;
关键词
AZ80 magnesium alloy; polycrystal plasticity; texture; hot forward extrusion; dynamic recrystallization; DYNAMIC RECRYSTALLIZATION; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; ZIRCONIUM ALLOYS; AZ31; EVOLUTION; MG; SIMULATION; MICROSTRUCTURE; DUCTILITY;
D O I
10.1016/S1003-6326(16)64203-6
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The visco-plastic self-consistent (VPSC) model is extended to take the dynamical recrystallization (DRX) into account so that the hot extrusion texture of AZ80 magnesium alloy can be properly modeled. The effects of extrusion temperatures and imposed boundary conditions on the resulting textures were investigated, and good agreement can be found between the simulated and the measured extrusion textures. The simulated results show that the DRX grains are responsible for the formation of the {2 (1) over bar(1) over bar0} fiber component since the {10 (1) over bar0} poles of the DRX grains are tilted away from those of the unrecrystallized grains during the formation of their high angle boundaries (HABs). Furthermore, the basal poles of the grains are favorably oriented to the transversal direction (TD) where the imposed deformation is larger due to lower slip resistance of the basal slip. The elevated temperature enhances the activity of pyramidal < c+a > slip modes and gives rise to a larger recrystallized volume fraction, resulting in a weakened extrusion texture.
引用
收藏
页码:1063 / 1072
页数:10
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