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以TIG电弧为热源,Al Mg3焊丝为填充材料,采用BSE、EDS、XRD以及万能拉伸试验机对5052铝合金和Ti-6Al-4V钛合金的TIG熔钎焊接头界面行为及断裂行为进行了研究。结果表明:焊接电流显著影响铝/钛钎焊界面反应层的形态及厚度,进而对铝/钛焊接接头的力学性能产生显著影响。当焊接电流为75 A时,铝/钛钎焊界面形成锯齿状的Ti Al3反应层,在拉伸试验中,接头断裂发生在铝合金母材,最高抗拉强度达到185 MPa。
The interfacial behavior and fracture behavior of TIG fusion brazed joints of 5052 aluminum alloy and Ti-6Al-4V titanium alloy were investigated by using TIG arc as the heat source and Al Mg3 as filling material. BSE, EDS, XRD and universal tensile testing machine the study. The results show that the welding current significantly affects the morphology and thickness of the reaction layer at the aluminum / titanium brazing interface, which in turn has a significant effect on the mechanical properties of the aluminum / titanium welded joint. When the welding current is 75 A, the serrated Ti Al3 reaction layer is formed on the aluminum / titanium brazing interface. In the tensile test, the joint fracture occurs in the aluminum alloy base material and the maximum tensile strength reaches 185 MPa.