High Temperature Deformation Behavior ofTi40 Burn Resistant Alloy and Its Constitutive Equation

摘要

Ti40 alloy is a single β phase burn resistant titanium alloy. Its high temperature deformation behavior wasstudied by Gleeble-1500 thermal-simulator and it constitutive equation was set up. The results suggest thatthere is a bit abrupt flow stress drops followed by steady state in Ti40 alloy as annealing. Its deformationactivation energies are 215.7 kJ/mol for 650～850°C and 269 kJ/mol for 950～1000 °C, which are close to orbigger than the values for self and solute lattice in pure b titanium, thereby, the deformation behavior attemperature range is controlled by lattice diffusion for 650°C850°C, or mainly controlled by dynamicrecrystallization for 950～1000 °C. Its constitutive equations for different deformation behavior are set up.