Microstructure and Properties of AZ31 Alloy by ECAP and Electropulsing Treatment Processed
Author of the article:ZHAO Guangwei;FAN Jianfeng;ZHANG Hua;ZHANG Qiang;DONG Hongbiao;XU Bingshe
Author's Workplace：Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Research Center of Advanced Materials Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China
Key Words：electroplsing treatment(EPT) equal channel angular pressing(ECAP) AZ31 Mg alloy recrystallization mechanical properties
Abstract：
A set of ECAP and electropulsing treatment(EPT)experiments were designed to investigate the effect of ECAP and EPT parameters on the microstructure evolution and the mechanical properties of AZ31 Mg alloys.The ECAP-AZ31 Mg alloy was rolled multiple passes at room temperature,and then the static recrystallization of the rolled AZ31 alloy was accelerated by high-energy EPT.The Gibbs free energy change in the alloy system and the recovery effect of the EPT during this process were analyzed to reveal the recrystallization process of EPT.The results show that the grain size of AZ31 magnesium alloy decrease from 25μm to 1.05μm after 5 min pulse treatment with output pulse width of 50μs and current density of 4.55×10~9 A/m^2.The yield strength and ultimate tensile strength are 316 MPa,425 MPa,and the elongation is 12.9%,respectively.
