Prediction of Flow Stress for Nanosized Zr(Y)O2 Particle Reinforced W Alloy by Several Constitutive Models
摘要
The prediction accuracy of constitutive equation affects the simulation results of finite element method to some extent. Four constitutive models were established to evaluate the hot deformation behaviors of W-Zr(Y)O2 alloy. Moreover, a comparative study was realized for predictability of these models by using the correlation coefficient (R) and average absolute relative errors (AARE). The strain-compensation Arrhenius model can predict flow stress more precisely, with the highest R value of 0.9383 and lowest AARE value of 4.0265%. Modified Johnson-Cook model has the lowest prediction precision among four models. The present research would provide some constitute parameters and basic data for the plastic deformation simulation of oxide particle dispersion-strengthened tungsten alloy.