Effect of Pulsed Magnetic Field on the Residual Stress of Rolled Magnium Alloy AZ31 Sheet

• 作 者: Meng Yan Cong Wang Tianjiao Luo Yingju Li Xiaohui Feng Qiuyan Huang Yuansheng Yang
• 机 构: Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Sc
• 出 处: 金属学报（英文版）
• 发表日期: 2021年1期
• 关键词: Wrought magnesium alloy Residual stress Pulsed magnetic field Rolled AZ31 sheet

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 effect of PMF on residual stress of rolled AZ31 sheet was investigated and its mecha-nism 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.