5083铝合金搅拌摩擦焊接头组织及力学性能研究  

Microstructure and Mechanical Properties of Friction Stir Welded Joint of 5083 Aluminum Alloy

作　　者：王耀[1] Wang Yao(Shanxi College of Mechatronics,Changzhi Shanxi 046000)

机构地区：[1]山西机电职业技术学院,山西长治046000

出　　处：《山西冶金》2021年第4期12-15,共4页Shanxi Metallurgy

摘　　要：采用搅拌摩擦焊焊接5083铝合金,光学显微镜OM、透射电镜TEM对焊接接头进行金相分析,拉伸试验和硬度试验对焊接接头力学性能进行分析。结果表明,焊接接头焊核区为晶粒细小的等轴晶组织,热力影响区晶粒细小且沿剪切方向拉长,热影响区晶粒明显长大。其接头的力学性能显著优于传统的熔化焊,抗拉强度约为母材的90%,塑性与母材相当;硬度分布均匀,可达母材的90%。Friction stir welding(FSW)was used to weld 5083 aluminum alloy.The microstructure of the welded joint was analyzed by OM and TEM,and the mechanical properties of the welded joint were analyzed by tensile test and hardness test.The grains in the heat affected zone are fine and elongate along the shear direction.The grains in the heat affected zone grow up obviously.The tensile strength of the joint is about 90%of that of the base metal,the plasticity is equivalent to that of the base metal,and the hardness distribution is uniform up to 90%of that of the base metal.

关 键 词：5083铝合金 搅拌摩擦焊 接头组织 力学性能 

分 类 号：TG441.7[金属学及工艺—焊接]