Hot deformation behavior and microstructure evolution of Cu-2Ti-0.3Zr alloy
Cu-2Ti-0.3Zr alloy was prepared by vacuum melting technology.Under the conditions of deformation temperature of 750-900 ℃and strain rate of 0.001-1 s-1,hot deformation tests were conducted on the Cu-2Ti-0.3Zr alloy using Gleeble-1500D thermal simulation testing machine.By analyzing the hot deformation behavior of the alloy,its constitutive equation and hot processing map were constructed,and the microstructure evolution under different deformation conditions was analyzed.The results show that the flow stress of the alloy increases with the decrease of deformation temperature and the increase of strain rate.By drawing hot processing map,the optimal hot working process for the Cu-2Ti-0.3Zr alloy is obtained:the deformation temperature of 825-900 ℃ and the strain rate of 0.010-0.050 s-1.Under optimal process conditions,the microstructure of the alloy mainly consists of deformed grains and equiaxed subgrain structure.
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