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Investigation of the alloying effect on deformation behavior in Mg by Visco-Plastic Self-Consistent modeling

查看全文 作　　者：Alireza [1]Maldar;Leyun [1]Wang;Gaoming [1]Zhu;Xiaoqin [1,2]Zeng 高影响力作者 机构地区：[1]National Engineering Research Center of Light Alloy Net Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;[2]The State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China高影响力机构 出　　处：《Journal of Magnesium and Alloys》索引2020年第8卷第1期,共9页高影响力期刊 基　　金：The authors gratefully acknowledge the financial support of the projects from the National Natural Science Foundation of China(Nos.51631006,51671127,51825101)。 摘　　要：Alloying elements can drastically alter the deformation behavior of Mg.In the present work,Visco-Plastic Self-Consistent(VPSC)modeling was employed to investigate the effect of alloying elements on Mg’s tensile behavior,in particular the relative activity of different slip and twinning modes.Mg-0.47 wt.%Ca,Mg-2 wt.%Nd,and AZ31 extruded alloys were deformed by micro-tensile tests in a scanning electron microscope(SEM).Texture and grain size measured by electron backscatter diffraction(EBSD)were used as the input for VPSC.After parameter optimization,the VPSC model successfully reproduced the stress-strain curve of each alloy.Simulation results indicate that the slip/twinning activity in the three alloys are different.Mg-0.47 wt.%Ca shows strong extrusion texture,and prismatic slip was quite active during its tensile deformation.In contrast,Mg-2 wt.%Nd shows weak extrusion texture,and basal slip was dominant.This alloy also developed more twinning activity than the other two alloys.AZ31 shows strong extrusion texture similar as Mg-0.47 wt.%Ca,but prismatic slip was less active in it.The slip/twinning activity revealed by the VPSC model can explain the difference in the tensile behavior of the three alloys. 关 键 词：Mg alloys Crystal plasticity SLIP EBSD Tensile test
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