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The deformation flow behaviors of Ti-45Al-5.4V-3.6Nb-0.3Y alloy at different temperatures and strain rates were studied by isothermal compressing simulation test.The apparent activation energy of deformation was calculated to be 402.096 kJ/mol and constitutive equation was established to describe the flow behavior.Microstructure and flow softening observations exhibited that Ti-45Al-5.4V3.6Nb-0.3Y alloy had bad hot workability at low temperature (lower than 1 100 oC) and high strain rate (higher than 0.5 s–1) characterized by localization deformation and instability.With deformation temperature higher than 1 150 oC and strain rate lower than 0.01 s–1,the alloy owned good hot deformability,and plenty of dynamic recrystallized grains could be observed in the deformed microstructures.
The deformation flow behaviors of Ti-45Al-5.4V-3.6Nb-0.3Y alloy at different temperatures and strain rates were studied by isothermal compressing simulation test. The apparent activation energy of deformation was calculated to be 402.096 kJ / mol and constitutive equation was established to describe the flow behavior. Microstructure and flow softening observations prospects that Ti-45Al-5.4V3.6Nb-0.3Y alloy had bad hot workability at low temperature (lower than 1 100 oC) and high strain rate (higher than 0.5 s- 1) characterized by localization deformation and instability. W deformation temperature higher than 1 150 oC and strain rate lower than 0.01 s-1, the alloy has good hot deformability, and plenty of dynamic recrystallized grains could be observed in the deformed microstructures.