Study on the Thermal Deformation Behavior and Collaborative Recrystallization Mechanism for a Coarse-Grained Near-β Titanium Alloy Ti6455x

To study the effect of hot working on the toughening of titanium alloys, a near-β titanium alloy T4655x was designed, with room temperature tissues having only large-size β grains and a deformation activation energy of only 128.63 kJ/mol, which is lower than that of the pure β-Ti. The thermal deformation behavior of the alloy was also analyzed under different hot working parameters. It was observed that the dissipation efficiency coefficient η value was higher at low strain rates, and the deformed tissues were sufficiently softened with good properties. A synergistic process of CDRX and DDRX exists when machined at 1223 K, 0.001s^-1