Influence of Deformation on Microstructures and Mechanical Properties of TC25 Titanium Alloy Cake Billet

After maintained at T_β+25 ℃ for a certain period of time, the Ф240 mm TC25 titanium alloy bars were forged into cake billets with the deformations of 20%, 40% and 60%, and the microstructures and tensile mechanical properties of the TC25 titanium alloy cake billets were investigated.The results showed that the microstructures of the TC25 titanium alloy cake billets of different deformations were all basket weave structure with flat fascicular α phases intertwining each other.With the increase of deformation, the number of the flat fascicular α phases decreased, the orientation of α phases weakened and the size of stripα phases decreased.Meanwhile, as the deformation increased, the tensile strength of TC25 titanium alloy improved.