动车铝合金搅拌摩擦焊接头疲劳性能的研究  

Mechanical Fatigue Properties of FSW Welded Joint of Aluminum Alloy for Vehicle

作　　者：王敏[1] 郭淑兰[1] 王海东[1] 

机构地区：[1]长春工程学院机电学院,吉林长春130012

出　　处：《机械工程与自动化》2014年第5期99-100,103,共3页Mechanical Engineering & Automation

基　　金：吉林省教育厅重点资助项目(2014年第424号)

摘　　要：分析了动车用6005A铝合金的搅拌摩擦焊接头的显微组织及疲劳性能。研究表明:接头表面有Al2O3生成,接头焊核区是细小的等轴晶,并有"洋葱环"形貌,热影响区晶粒粗大,接头的疲劳强度低于母材,但高于MIG焊,疲劳断口为韧窝与准解理的混合断口。6005A aluminum alloy fatigue properties and microstructures were analyzed in this paper ,the results show that Al2 O3 is generated in joint surface ,the weld nugget zone is of fine grains ,and with＆quot;onions rings＆quot;morphology .The grain size of HAZ has a certain degree of growth and coarsening .The fatigue strength of welded joint is lower than the base material ,but higher than MIG welding ,fatigue fracture is mixed-rupture of dimple and quasi-cleavage .

关 键 词：疲劳性能 搅拌摩擦焊 疲劳断口 铝合金 

分 类 号：TG457.14[金属学及工艺—焊接]