Hot Deformation Behavior and Hot Rolling Properties of a Nano-Y2O3 Addition Near-? Titanium Alloy

The hot deformation behavior and rolling based on the processing map of a nano-Y2O3 addition near-? titanium alloy were investigated. isothermal compression tests conducted at various temperatures (950?–1070 °C) strain rates (0.001–1 s?1), up to true 1.2. flow stress was strongly dependent temperature rate, decreasing with increased decreased rate. average activation energy 657.8 kJ/mol 405.9 in (? + ?) ? region, respectively. high peak contributed Y2O3 particles refractory elements comparing other alloys composites. mechanisms region dynamic recovery spheroidization ? phase, while phase field mainly controlled by recrystallization grains. Moreover, constitutive equation Norton–Hoff also obtained. Through optimal window determined strains 0.2, 0.4 0.6, sheet multi-pass (1050 °C/0.03–1 s?1) received directly from as-cast alloy. ultimate tensile strength yield 1168 MPa 1091 room temperature, 642 535 650 °C, respectively, which performs some advantages current research.