A short note on approximating the critical strain for the onset of dynamic recrystallization

This note provides a MATLAB code to determine the critical strain associated with the onset of dynamic recrystallization. The code takes a closed-form constitutive model and derives the critical strain by solving ${\mathrm{\partial }}^2\theta \mathrm{/}\mathrm{\partial }{\sigma }^2=0$. Moreover, several models that could be used for this purpose are studied.