Influence of Filler on the Microstructure, Mechanical Properties and Residual Stresses in TIG Weldments of Dissimilar Titanium Alloys

The influence of titanium alloy (Ti–5Al–2.5Sn) and commercially pure (cpTi) as fillers on dissimilar pulsed tungsten inert gas weldments Ti–5Al–2.5Sn/cpTi was investigated in terms microstructure, mechanical/nano-mechanical properties, residual stresses. A partial martensitic transformation observed the for all welding conditions due to high heat input. microstructure evolved FZ/cpTi interfacial region be most sensitive proportion α stabilizer filler alloy. Furthermore, addition improved tensile properties nano-mechanical response weld joint owing increased volume metal joint. As compared Ti–5Al–2.5Sn wire, use cpTi wire proved better energy absorbed during impact tests, strength ductility welds. An asymmetrical stresses profile close centerline, with compressive side both obtained without wires. This attributed mainly low thermal conductivity Ti–5Al–2.5Sn. presence also influenced nano-hardness across weldments.