Hot deformation behavior of Ti-5553 alloy

The flow stress behavior of Ti-5553 Titanium alloy during hot compression deformation was studied by thermal simulation test at the deformation temperature of 800-860℃and the strain rate of 0.1-10 s~(-1) on the Gleeble-1500 thermal and mechanical simulator.The results show that the flow stress is controlled by both strain rate and deforming temperature.The flow stress decreases with the increase of deforming temperature,and increases with the increase of strain rate until the flow stress reaches the peak value,then the flow stress remains constant.The flow behaviors are described by the hyperbolic sine constitutive equation,and the average activation energy calculated is 611 kJ/mol.