Effect of Pulsed Magnetic Field on the Residual Stress of Rolled Magnium Alloy AZ31 Sheet
来源期刊：Acta Metallurgica Sinica2021年第1期
论文作者：Meng Yan Cong Wang Tianjiao Luo Yingju Li Xiaohui Feng Qiuyan Huang Yuansheng Yang
文章页码：45 - 53
摘 要：A novel method of pulsed magnetic field（PMF） treatment was developed to eliminate the residual stress of rolled magnesium alloy AZ31 sheet in this study.The eff ect of PMF on residual stress of rolled AZ31 sheet was investigated and its mechanism was analyzed.The experimental results revealed that the pulse frequency had a significant impact on residual stress.After 10.0 Hz PMF treatment,the average and maximum reduction rates of residual stress along the rolled direction were 26.6% and 30.3%,respectively.It was found that the dislocation density and parallel dislocation in grains of the rolled sheet increased after it was treated by the pulsed magnetic field.The simulation results showed that the Lorentz force generated by the pulsed magnetic field can lead to basal slip,thereby resulting in local plastic deformation.Besides,the Joule heat produced during the PMF treatment was conducive to the elimination of residual stress.
Meng Yan1,2，Cong Wang1，Tianjiao Luo1,2，Yingju Li1,2，Xiaohui Feng1,2，Qiuyan Huang1,2，Yuansheng Yang1
1. Institute of Metal Research,Chinese Academy of Sciences2. School of Materials Science and Engineering,University of Science and Technology of China
摘 要：A novel method of pulsed magnetic field（PMF） treatment was developed to eliminate the residual stress of rolled magnesium alloy AZ31 sheet in this study.The eff ect of PMF on residual stress of rolled AZ31 sheet was investigated and its mechanism was analyzed.The experimental results revealed that the pulse frequency had a significant impact on residual stress.After 10.0 Hz PMF treatment,the average and maximum reduction rates of residual stress along the rolled direction were 26.6% and 30.3%,respectively.It was found that the dislocation density and parallel dislocation in grains of the rolled sheet increased after it was treated by the pulsed magnetic field.The simulation results showed that the Lorentz force generated by the pulsed magnetic field can lead to basal slip,thereby resulting in local plastic deformation.Besides,the Joule heat produced during the PMF treatment was conducive to the elimination of residual stress.
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