Dissimilar joining of TC4 alloy to ST16 steel by GTAW. (January 2019)

• Record Type: Journal Article
• Authors: Hao, Xiaohu; Dong, Honggang; Li, Peng; Xia, Yueqing
• Is Part Of: Journal of manufacturing processes. Volume 37(2019)
• Page Start: 413
• Page End: 417
• Publication Date: 2019-01
• Subjects: Titanium alloy -- Steel -- Welding -- Microstructure -- Intermetallics -- Strength; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2018.12.016
• Languages: English
• ISSNs: 1526-6125

Abstract

Highlights: Titanium alloy was successfully welded to steel by GTAW with ERCuSi3 filler wire. The joint fractured at steel substrate during tensile test. IMCs, including Ti2 Cu, TiCu, AlCu2 Ti, TiCu2 and Ti5 Si3, formed in reaction zone. The copper-based filler wire could restrict the formation of brittle Ti-Fe IMCs. Abstract: The feasibility of direct fusion welding of TC4 alloy to ST16 steel by GTAW using CuSi3 filler wire was investigated. Defect-free fusion welded joints were obtained. Various intermetallic compounds, such as Ti2 Cu, TiCu, AlCu2 Ti, TiCu2 and Ti5 Si3 phases, orderly formed in Ti/weld transition zone. Ti and Si diffused into ST16 steel, and an interface formed between copper weld and ST16 steel substrate. The resultant joints fractured at the ST16 steel substrate, and the tensile strength reached 282 MPa. The formation of various Tix Cuy IMCs and the solution strengthening induced by diffusion of Ti and Si led to the increase of microhardness in Ti/weld transition zone and copper/steel interface, respectively.