当前位置：首页 > 过刊浏览->2019年40卷第4期
电脉冲处理和等径角挤压对AZ31镁合金组织与性能的影响
Microstructure and Properties of AZ31 Alloy by ECAP and Electropulsing Treatment Processed
浏览(1745) 下载(6)
- DOI:
- 作者:
- 赵广伟 樊建锋 张华 张强 董洪标 许并社
ZHAO Guangwei;FAN Jianfeng;ZHANG Hua;ZHANG Qiang;DONG Hongbiao;XU Bingshe
- 作者单位:
- 太原理工大学新材料界面科学与工程教育部重点实验室 太原理工大学山西新材料科学与工程研究中心 太原理工大学材料科学与工程学院
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
- 关键词:
- 电脉冲处理(EPT) 等径角挤压(ECAP) AZ31合金 再结晶 力学性能
electroplsing treatment(EPT) equal channel angular pressing(ECAP) AZ31 Mg alloy recrystallization mechanical properties
- 摘要:
- 设计了一组ECAP和电脉冲处理实验来研究ECAP和电脉冲处理参数与AZ31镁合金微观组织演变之间的关系。对ECAP后的AZ31镁合金在室温下进行多道次轧制,然后通过高能电脉冲处理促进轧制后的AZ31镁合金的静态再结晶。通过分析电脉冲过程中合金体系内的能量变化和电脉冲的回复效应作用,揭示电脉冲促进再结晶过程的机理。结果表明:AZ31镁合金经过输出脉宽50μs、电流密度4.55×10~9A/m^2的电脉冲处理5 min后,样品晶粒尺寸从25μm减小到1.05μm,屈服强度和极限拉伸强度分别是316 MPa和425 MPa,伸长率为12.9%。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.