铝/镁异种材料搅拌摩擦焊接头组织与拉剪强度  

Microstructure and Tensile Shear Strength of Al/MgDissimilar Materials Friction Stir Welding Joints

作　　者：魏艺涵 汪晟钰 周雪 高吉成[1] WEI Yi-han;WANG Sheng-yu;ZHOU Xue;GAO Ji-cheng(School of Mechanical Engineering,Yangzhou University,Yangzhou 225127,China)

机构地区：[1]扬州大学机械工程学院,江苏扬州225127

出　　处：《机械工程与自动化》2024年第3期101-102,共2页Mechanical Engineering & Automation

基　　金：江苏省大学生创新创业训练计划项目(202311117129Y);扬州大学教学改革研究课题(xkjs2023046)。

摘　　要：对7075铝合金与AZ31镁合金进行搅拌摩擦焊搭接实验,研究了接头的微观组织与拉剪强度。结果表明,铝合金为上板时,焊接表面光滑平整,焊接界面出现铝、镁混合带状组织;镁合金为上板时,焊接界面出现机械互锁结构;铝合金为上板,焊接速度为50 mm/min时的拉剪强度最高,约为68.5 MPa。The friction stir lap welding of 7075 aluminum alloy and AZ31 magnesium alloy was carried out.The microstructure and tensile shear strength of the joints were studied.The results showed that when the Al alloy was as the upper plate,the welding surface was smooth and flat,and the Al/Mg mixed banded structure appeared at the welding interface.The mechanical interlock structure was found when the Mg alloy was as the upper plate.The highest tensile shear strength of the joint was 68.5 MPa when the Al alloy was as the upper plate and the welding speed was 50 mm/min.

关 键 词：铝/镁 搅拌摩擦焊 显微组织 力学性能 

分 类 号：TG453.9[金属学及工艺—焊接]