A new kinetics model of dynamic recrystallization for magnesium alloy AZ31B

► In this study, the new kinetics model of DRX was built. ► The model reflects slow-beginning, rapid-increasing, slow-rising-to-balance phases. ► The strain ɛ3 is of great significance to optimize industrial processes. ► This new kinetics model of DRX has fewer parameters-kv except ɛc and ɛ0.5. ► The calculated results are in good agreement with the experimental data.