Texture and Microstructure of Ti-49at%Al after Dynamic Recrystallization and Annealing

Abstract

A Ti-49at%Al gamma-base titanium alloy was deformed at high temperature (T=1150-1200°C) and low strain rates as well as at lower temperature (T=1000°C) and higher strain rates. Textures with distinctly different strength occurred depending on the deformation conditions. Subsequent heat treatments were applied in order to investigate the development of textures and microstructures. Textures and microstructures after deformation at 1150°C<T<1200°C are stabilized by α₂-Ti₃Al-precipitates at the γ-TiAl grain boundaries which occur after the first annealing at 1050°C.