Physically-Based Model for Static Recrystallization in AZ31

A physically-based model for static recrystallization in alloy AZ31 is presented. The model predicts the kinetics of recrystallization as a function of the applied strain and the annealing temperature. A key feature of the model is the incorporation of the effects of recovery and solute drag on the recrystallization kinetics. In addition, the model attempts to take into account the effect of heterogeneity of the deformed state on recrystallization kinetics. Preliminary experimental studies were carried out in order to estimate the parameters that enter into the model. Grain-growth experiments were carried out on pure Mg, Mg-Al and Mg-Zn alloys in order to estimate the boundary mobility. Recovery kinetics was measured at low temperatures in order to quantify the contribution of recovery to the depletion of the stored energy.