AZ31镁合金高应变速率轧制宏微观仿真

doi:10.11896/cldb.20040038

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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.

Key words： AZ31 magnesium alloy high strain rate rolling finite element dynamic recrystallization model macro-micro simulation

Published: 03 August 2021

CLC number:

TG146.2

Fund:National Natural Science Foundation of China (52071139, 51905166), the Natural Science Foundation of Hunan Province(2018JJ3180, 2020JJ5198), the Research Foundation of Education Bureau of Hunan Province (18B198).

About author:: Xiao Liu studied in Hunan University and McGill University during Ph.D. study and received her Ph.D. degree. She is currently an associate professor in Hunan University of Science and Technology. Her research interests are plastic processing, microstructure evolution and the mechanism for propagation of crack in light alloy. She has guaranteed 6 projects including 2 National Science Foundation of China.

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	LIU Xiao
	WANG Yangyang
	YE Junhong
	ZHU Biwu
	YANG Hui
	HU Mingyue
	TANG Changping
	LIU Wenhui

Cite this article:

LIU Xiao,WANG Yangyang,YE Junhong, et al. Macro-micro Simulation of AZ31 Magnesium Alloy Under High Strain Rate Rollin[J]. Materials Reports, 2021, 35(14): 14101-14106.

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http://www.mater-rep.com/EN/10.11896/cldb.20040038 OR http://www.mater-rep.com/EN/Y2021/V35/I14/14101

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