AZ31镁合金和7050铝合金ECAP过程的数值模拟研究  

Numerical Simulation Study of ECAP Process of AZ31 Magnesium Alloy and 7050 Aluminum Alloy

作　　者：刘毅[1] 薛凤梅 墨馨遥 王廖子 LIU Yi;XUE Fengmei;MO Xinyao;WANG Liaozi(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Jilin University,Changchun 130022,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]吉林大学材料科学与工程学院,吉林长春130022

出　　处：《热加工工艺》2024年第9期73-79,83,共8页Hot Working Technology

基　　金：国家自然科学基金资助项目(51905371)。

摘　　要：利用Abaqus有限元软件分别对AZ31镁合金和7050铝合金进行等通道转角挤压(ECAP)数值模拟研究。利用有限元(FE)模拟得到应力场、应变场及载荷-位移曲线,分析了在不同挤压温度、挤压速度、摩擦条件和不同截面下等通道转角挤压的变形规律。结果表明,挤压温度升高可以降低挤压载荷,这有利于AZ31镁合金挤压,在摩擦较小情况下进行变形有利于降低挤压载荷,提高变形均匀性;在不考虑变形过程中温升效应的情况下,挤压速度对挤压载荷影响较小,当挤压速度提高时,最大等效应变值有所提高;圆形截面比方形截面更适合进行等通道转角挤压。The Abaqus finite element software was used to perform equal channel angular pressing(ECAP)numerical simulation studies of AZ31 magnesium alloy and 7050 aluminum alloy.The stress field,strain field and load-displacement curve were obtained by finite element(FE)simulation.The deformation laws of the ECAP at different extrusion temperatures,extrusion velocities,friction conditions and different cross sections were analyzed.The results show that increasing extrusion temperature can reduce the extrusion load,which is conducive to the extrusion of AZ31 magnesium alloy.Deformation under small friction is conducive to reducing the extrusion load and improving the deformation uniformity.Without considering the effect of temperature rise in the deformation process,the extrusion speed has a small effect on the extrusion load,and the maximum equivalent strain value increases when the extrusion speed increases.The circular cross section is more suitable for ECAP than the square cross section.

关 键 词：等通道转角挤压(ECAP) 大塑性变形(SPD) 数值模拟 AZ31镁合金 7050铝合金 

分 类 号：TG379[金属学及工艺—金属压力加工]