Microstructure snd Mechanical Properties of Rolled AZ31 Alloy Sheets Processed by Electropulsing Treatment

作者：Li Beibei; Fan Jianfeng^*; Zeng Xun; Zhang Hua; Zhang Qiang; Wang Xiaodan; Dong Hongbiao; Xu Bingshe

来源：Rare Metal Materials and Engineering, 2017, 46(9): 2695-2701.

• AZ31 magnesium alloy
• electropulsing treatment
• nucleation
• recrystallization

The microstructure evolution of rolled AZ31 alloy sheets with 10%, 15% and 20% rolling reduction by electropulsing treatment (EPT) was investigated by VHX-2000 optical microscope and scanning electron microscope equipped with electron backscattered diffraction (EBSD). After EPT with 30 mu s in pulse-width, 4.16x10(9) A/m(2) in current density and 0.003 in duty ratio for 10 min processing time, the average grain size of AZ31 alloy is refined from 150 mu m to 20 mu m, the tensile strength is improved to 265 MPa and the elongation can reach 19.7%. The effect of the thermal and athermal effect on the recrystallization during EPT was analyzed. The result shows that the athermal effect plays a major role in recrystallization and the mechanism of the athermal effect was also revealed.

• 出版日期2017-9
• 单位太原理工大学