Optimization of Vacuum Brazing Process Parameters in Ti-6Al-4V Alloy

In this study, the optimal parameters of vacuum brazing titanium alloy Ti-6Al-4V with TiCuNi filler (30 μm-thick metal foil) were investigated by Taguchi method. The microstructures, microhardness, and fractographs brazed joints produced these also analyzed. results study demonstrate that for best tensile strength, combination process is: 890 °C soaking temperature, 60 min time, 975 45 time. strength obtained welding was found to be 1265 MPa. A small error 0.24% between experimental predicted values confirmed validity combined optimized parameters. Finally, from means variance analysis (ANOVA), out four factors, highest contribution accounting 47.3%. base material (VB) weldment is mainly composed white granular α titanium, slender β layered structures are interlaced β. weld bead, Ti-15Cu-15Ni, contains many needle-shaped Widmanstätten structures. This structure associated higher lower ductility. bead hardness parts than laser beam gas tungsten arc weldment. demonstrates feasibility method obtaining joints.