High-temperature Deformation Behavior of New Near-β Titanium Alloy Ti-7333

Compression tests were conducted under constant temperature to investigate the flow behavior of the new near-β titanium alloy Ti-7333.The results reveal that flow stress of the tested alloy is very sensitive to processing parameters.With the increase of temperatures and decrease of strain rates,the flow stress of Ti-7333 significantly decreases.The flow behavior of the alloy is dominated by dynamic recovery,acompanied by dynamic recrystallization.In addition,based on the evolution model of dislocation density put forward by Mecking and Bergstrom,a constitutive model was constructed to predicate the flow stress of Ti-7333.Due to its relatively limited parameter numbers,this model could be conveniently applied to accurately describe the flow stress during thermal deformation of the alloy.