A New Constitutive Equation to Predict Single Peak Flow Stress Curves

Abstract

In this study a new constitutive equation, using the extrapolation of dynamic recovery (DRV) flow stress curve and kinetic equation for dynamic recrystallization (DRX), has been developed. This model is expressed in terms of characteristic points such as critical stress, critical strain, DRX steady state stress, and DRV saturation stress. Moreover, this analysis was done for the stressstrain curves under hot working condition for TiIF steel, but it is not dependent on the type of material and can be extended for any condition that a single peak dynamic recrystallization occurs. The results indicate that the stressstrain curves predicted by this model are in a good agreement with experimentally measured ones at all deformation conditions.