Macro-micro Simulation of AZ31 Magnesium Alloy Under High Strain Rate Rollin
LIU Xiao1,*, WANG Yangyang1, YE Junhong2, ZHU Biwu1, YANG Hui1, HU Mingyue1, TANG Changping1, LIU Wenhui1
1 Key Laboratory of High Temperature Wear Resistant Materials Preparation Technology of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China 2 School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Abstract: Macroscopical finite element model and microcosmic dynamic recrystallization model were established to simulate high strain rate rolling of AZ31 magnesium alloy over the temperature ranges 300 ℃ to 400 ℃ with average strain rates of 10—29 s-1. The results according to the comparison between simulated results and experimental results show that with increasing the average strain rate, both the equivalent stress diffe-rence of the simulated rolled plate along the width direction and the macro crack length decrease. The greater the difference in the equivalent stress, the longer the crack length. The results of macro simulation agree well with the experimental results. Dynamic recrystallization of AZ31 magnesium alloy during high strain rate rolling was simulated using micro-dynamic recrystallization model and macro-finite element history loa-ding coupled cellular automata (CA). With strain rate increasing, recrystallization is gradually completely, followed by dissipation of stress concentration, finally causing the decrease of crack length. The high strain rate rolling process of AZ31 magnesium alloy can be accurately simulated by establishing a multi-scale macro and micro simulation model. This work provides a new idea for accurate control of high strain rate rolling of magnesium alloy.
刘筱, 王洋洋, 叶俊宏, 朱必武, 杨辉, 胡铭月, 唐昌平, 刘文辉. AZ31镁合金高应变速率轧制宏微观仿真[J]. 材料导报, 2021, 35(14): 14101-14106.
LIU Xiao, WANG Yangyang, YE Junhong, ZHU Biwu, YANG Hui, HU Mingyue, TANG Changping, LIU Wenhui. Macro-micro Simulation of AZ31 Magnesium Alloy Under High Strain Rate Rollin. Materials Reports, 2021, 35(14): 14101-14106.
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2021, Vol. 35 
