Constitutive Model for Elevated Temperature Deformation of Ni-Al Bronze
The hot deformation behavior of Ni-Al bronze alloy was studied by high temperature compression experiment on Gleeble-1500 thermal-mechanical simulator at 800-950 ℃,strain rate of 0.002-5 s-1.Based on the data of high temperature compression experiment,the flow stress curves of Ni-Al bronze under different deformation conditions were drawn,and the constitutive equation was presented by linear regression.The results demonstrate that the flow stress decreases with the increase of deformation temperature,while increases with the increase of strain rate.The deformation activation energy is 313.03 kJ/mol.