Butt brazing of titanium alloys/stainless steel plates by MIG-TIG double-sided arc welding process with copper filler metal
Zhi Cheng, Jihua Huang, Zheng Ye and 2 more
Journal of Materials Research and Technology · 2019
doi:10.1016/j.jmrt.2018.06.009 (opens in a new tab)
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Abstract
Butt brazing of titanium alloys with stainless steel by MIG-TIG double-sided arc welding (DSAW) process with copper filler metal has been performed. The microstructures and mechanical properties of the joint were investigated. The results show that a butt brazing joint with sound double-sided appearance was achieved. With low heat input of brazing mode and rapid cooling rate of arc welding process, the joint is free of brittle Ti-Fe intermetallic compounds (IMCs). The phase compositions in the joint are TC4/Ti2Cu + TiCu/TiCu + Ti5Si3/Cu + (Ti5Si3 + Cu + βTiCu4)/Fe5Si3 + (Cu) + FeSi/Fe(s,s)/304ss orderly from Ti6Al4V to 304ss. The average tensile strength of the butt joint reaches 278 MPa. Compared with the fusion welding joint, the tensile strength of the arc-brazing joint is significantly increased because of the elimination of Ti-Fe IMCs. Keywords: Microstructure, Metals and alloys, Welding, Brazing, Dissimilar metal joining, MIG-TIG double-sided arc welding
Abstract licence: CC BY-NC
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