Three-Sheet Spot Welds of 5052 Aluminum Alloy: Weld Growth and Failure Behavior
Resistance spot welding is used extensively in auto industry.Every commercial vehicle has 4000-5000 spot welds.The weldability, performance, and reliability are therefore important issues in design.In this paper, we studied weld nugget formation and failure behavior of three-sheet 5052 aluminum alloy resistance spot welds.The Peltier effect between the Cu-Al (the electrode and the A1 worksheet) to the nugget formation was noticed.The mechanical strength and fracture mode of the weld nuggets at the upper and lower interfaces were studied using tensile shear specimen configuration.Three failure modes were identified, namely, interfacial, mixed, and pull-out.The critical welding time and critical nugget diameter corresponding to the transitions of these modes were investigated.Finally, an empirical failure load formula for three-sheet weld similar to two-sheet spot weld was developed.
Resistance spot welding 5052 aluminum Three sheets Weld growth mechanisms Failure behavior
Fuyu Yan Zhen Luo Yuh J.Chao Yang Li Sansan Ao Xuetuan Cui
School of Materials Science and Engineering and Tianjin Key Laboratory of Advanced Joining Technolog School of Materials Science and Engineering and Tianjin Key Laboratory of Advanced Joining Technolog
国际会议
北京
英文
201-206
2014-10-19（万方平台首次上网日期，不代表论文的发表时间）