摘要
Ti 40 alloy is a single β phase burn resistant titanium alloy. Its high temperature deformation mechanism and stress strain ( σ ε ) curves were studied by Gleeble 1500 thermal simulator. The results suggest that there are a bit abrupt flow stress drops followed by steady state in Ti 40 alloy as annealing. The magnitude of the flow stress drop increases with strain rate and decreases with temperature. Its deformation activation energies are 174 kJ/mol for 650～850℃ and 276.7 kJ/mol for 950～1000℃, which are close to or bigger than the values for self and solute lattice diffusion in pure β titanium, thereby, the deformation mechanism at temperature range is controlled by lattice diffusion for 650～850℃, or mainly controlled by dynamic recrystallization for 950～1000℃.
Ti 40 alloy is a single β phase burn resistant titanium alloy. Its high temperature deformation mechanism and stress strain ( σ ε ) curves were studied by Gleeble 1500 thermal simulator. The results suggest that there are a bit abrupt flow stress drops followed by steady state in Ti 40 alloy as annealing. The magnitude of the flow stress drop increases with strain rate and decreases with temperature. Its deformation activation energies are 174 kJ/mol for 650～850℃ and 276.7 kJ/mol for 950～1000℃, which are close to or bigger than the values for self and solute lattice diffusion in pure β titanium, thereby, the deformation mechanism at temperature range is controlled by lattice diffusion for 650～850℃, or mainly controlled by dynamic recrystallization for 950～1000℃.
