Lap joining Al5052 to Ti6Al4V by GTAW with Al Si5 filler wire

查看全文 作　　者：Akhtar [1]Awais;[1]董红刚;[1]夏月庆;[1]李鹏

机构地区：[1]School of Materials Science and Engineering,Dalian University of Technology

出　　处：《China Welding》索引2019年第28卷第2期,共9页

基　　金：supported by the National Natural Science Foundation of China(51674060);the Fundamental Research Funds for the Central Universities(DUT18LAB01);the Collaborative Innovation Center of Major Machine Manufacturing in Liaoning 摘　　要：Lap Joining of 5052 aluminum alloy(Al5052)to Ti6Al4V titanium alloy(Ti6Al4V)was conducted by gas tungsten arc welding(GTAW)process with AlSi5 filler wire.Microstructure examination revealed that non-uniform persistent reaction layer developed in Al5052/Ti6Al4V interfacial area,and the intermetallic compounds(IMCs)layer of Ti(Al,Si)3 phase formed with the partial substitution of aluminum by silicon.The thickness of IMCs layer varied from less than 1μm to more than 5μm in accordance with rise in welding current.Aluminum,silicon and titanium elements in the IMCs layer and weld zone were identified by electron probe microanalysis(EPMA).The results demonstrated that sound Al5052/Ti6Al4V joints can be achieved in the range of 50 A–60 A welding current.The maximum tensile shear strength of 293 N/mm was attained at the optimized welding parameter and the joint fractured in the weld zone.Additionally,the micro-Vickers hardness at Al5052/Ti6Al4V interface was relatively higher in comparison with that of the weld seam and Ti6Al4V base metal as a consequence of IMCs formation. 关键词：gas TUNGSTEN ARC welding Al5052 TI6AL4V INTERMETALLIC compound mechanical property

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Lap joining Al5052 to Ti6Al4V by GTAW with Al Si5 filler wire

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