Study on Mechanical Properties and Constitutive Equation of Inconel625 Alloy at 200～600℃
The change of mechanical properties of Inconel625 alloy in 200-600℃was studied.The influence of temperature on the tensile strength was analyzed by means of SEM,universal material testing machine and other instruments.The results show that the tensile strength of Inconel625 alloy decreases gradually with the increase of temperature in 200-600℃.The retention rate of tensile strength at 600℃is 87.7%of the room temperature strength.The fracture mechanism evolves from ductile fracture to brittle fracture.High temperature tensile tests at different temperatures and strain rates are carried out.According to the test results,the constitutive equation of Inconel625 alloy in the process of hot deformation is derived.The measured value is compared with the predicted value,and the accuracy of the constitutive equation is verified.The maximum relative error is 6.04%,which has a good coincidence.
Inconel625 alloyhigh temperature tensionconstitutive equation
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