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 stress-strain curves under hot working condition for Ti-IF 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 stress-strain curves predicted by this model are in a good agreement with experimentally measured ones at all deformation conditions.
A New Constitutive Equation to Predict Single Peak Flow Stress Curves
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received January 1, 2012; final manuscript received October 10, 2012; published online January 23, 2013. Assoc. Editor: Joost Vlassak.
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Shafiei, E., and Ebrahimi, R. (January 23, 2013). "A New Constitutive Equation to Predict Single Peak Flow Stress Curves." ASME. J. Eng. Mater. Technol. January 2013; 135(1): 011006. https://doi.org/10.1115/1.4023186
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