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Preparation and Effect Analysis of {10–12} Extension Twins at the Edge of AZ31 Magnesium Alloy Plate
Zhiquan Huang,Chuanlu Qi,Yanchun Zhu,Guowei Yang,Hongyu Lai,Jinchao Zou 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.11
The edge samples of AZ31 magnesium alloy plate after hot rolling and annealing were compressed along the rolling direction(RD) under different deformation conditions. Then, the optimal conditions for the generation of {10–12} extension twinsand the microtexture evolution of edge samples were studied by using EBSD. The results show that the texture strength ofthe hot-rolled AZ31 magnesium alloy plate was significantly greater than that of the middle part. When the compressivestrain along the RD was small at the edge of the rolled piece at room temperature, a large number of extension twin layerswere generated. Grain matrix and twins coexisted. As the strain increased to 8.19%, the grains completely transformed intoextension twins. Along with the generation of extension twins, hard-oriented grains were consumed in large quantities andthe weakening effect of the basal texture was proportional to the volume fraction of the extension twins, while at high temperature(250 °C), the slip dominated the plastic deformation process.