Thermal Deformation Behavior and Constitutive Equation of Tungsten-Copper Alloy
[Purposes]Tungsten-copper alloy is a key material used in the aerospace and military fields.However,the accuracy of the constitutive equations adopted in the research on the flow stress and strain of tungsten-copper alloy is rather poor,which needs to be further studied.[Methods]High-temperature ten-sile experiments on tungsten-copper alloys were carried out under different temperatures and strain rates us-ing a vacuum tensile testing machine to study the thermal deformation behavior,and the constitutive equation of the tungsten-copper alloy was established.[Findings]The results show that the tungsten-copper alloy has obvious temperature softening effect and work hardening effect,and its flow stress decreases with the increase of temperature and the decrease of strain rate.The accuracy of the constitutive equation can be measured by using the correlation coefficient and the absolute average error.[Conclusions]Strain com-pensation can significantly improve the accuracy of the constitutive equation of tungsten-copper alloy.
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