Preparation and Welding Performance of Ti–6Al–4V Powder Compact Fabricated by Hot Isostatic Pressing
Powder metallurgy (P/M) Ti–6Al–4V alloy was produced by hot isostatic pressing from pre-alloyed powder in the present investigation. Electron beam welding (EBW) was used for butt joint of P/M Ti–6Al–4V sheets. Microstructure and tensile properties of P/M Ti–6Al–4V welded joint were studied. The results showed that the microstructure of the welded joint had a significant change due to the rapid cooling rate during the EBW process. The microhardness of the fusion zone was higher than that of other areas due to the occurrence of α' martensitic phase. The joint performance (tensile strength) was equal to that of weld matrix, and all of the tensile specimens failed in the base metal. For practical application of P/M Ti-based alloys, the ductility, strength and welding properties of materials could be optimized by proper microstructural design.
Yafang Han, Ying Wu, Guangxian Li, Fu Sheng Pan, Runhua Fan and Xuefeng Liu
R. P. Guo et al., "Preparation and Welding Performance of Ti–6Al–4V Powder Compact Fabricated by Hot Isostatic Pressing", Materials Science Forum, Vol. 849, pp. 760-765, 2016