Tungsten Inert Gas Welding–Brazing of AZ31B Magnesium Alloy to TC4 Titanium Alloy

查看全文 作　　者：Chuan [1]Xu;Guangmin [1]Sheng;Hui [1]Wang;Ke [1]Feng;Xinjian [1]Yuan

机构地区：[1]College of Materials Science and Engineering, Chongqing University

出　　处：《Journal of Materials Science & Technology》索引2016年第32卷第2期,共5页

基　　金：financial support by the National Natural Science Foundation of China (No. 51205428);the Fundamental Research Funds for the Central Universities (Nos. CDJZR13130040 and CDJZR12130047) 摘　　要：Tungsten inert gas(TIG) welding-brazing technology using Mg-based filler was developed to join AZ31 B Mg alloy to TC4 Ti alloy in a lap configuration.The results indicate that robust joints can be obtained with welding current in the range of 60-70 A.The joint interface was found to be likely composed of Mg-Ti diffusion reaction layer accompanied with Mg_(17)Al_(12) precipitate phase,indicating that metallurgical joining was achieved.The optimized joint with average tensile-shear strength of 190 N/mm^2 was obtained and fracture occurred at the Ti/fusion zone interfacial layer during tensile test.Moreover,the fracture surface was characterized by equiaxed dimple patterns accompanied with a few lamellar tearing.Finally,finite element modeling(FEM) numerical simulation was developed to analyze the distribution characteristics of the temperature field of joints. 关键词：钨极惰性气体保护焊 AZ31B镁合金 TC4钛合金钎焊技术有限元数值模拟拉伸剪切强度 AZ31镁合金焊接电流

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Tungsten Inert Gas Welding–Brazing of AZ31B Magnesium Alloy to TC4 Titanium Alloy

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