Effect of Isothermal Deformation Amount on Electron Beam Welded Joint of Ti60/Ti-22Al-25Nb

Ti60 and Ti-22Al-25Nb were joined by an electronic beam (EB) welding and then forged by a microprocessor-controlled 630 ton hydraulic press at different deformation amounts (30%, 40%, and 50%). The effect of the deformation amount on the microstructure and properties of the welded joint of Ti60/Ti-22Al-25Nb during isothermal forging was investigated. The results revealed that the samples exhibited great strength, which was insensitive to the microstructure because of the high τ_p. It was found that the elongation (A) and the reduction of area (Z) were strongly dependent on microstructural features. Ductility was greatly improved by the 40% and 50% deformation. Furthermore, the 40% deformation sample exhibited the greatest combination of strength and ductility.