Approach to oriented grain growth accounting during aluminum alloys recrystallization simulation

Abstract

The study focuses on the new approach to orientated growth modeling for aluminum alloys. Avrami equation for JMAK phase transformation model was applied to derive the relationship for texture volume fractions change during recrystallization. Two phases, recrystallized and non-recrystallized, are considered for Avrami equation derivation. Two recrystallized volume types were addressed: first, containing cube-oriented nuclei, growing with β-fiber orientations, second, containing the remaining nuclei, including cube-oriented nuclei without the boundary with β-fiber texture orientation material. The linear rate of cube-oriented volume nuclei migration k times exceeded the growth rate of the volume, identified as G and containing the other grains. The obtained relationships were integrated in the previously developed unique model of texture evolution during aluminum alloys thermomechanical treatment. It was used to simulate 3104 alloy commercial rolling in the continuous rolling mill and subsequent self-annealing in a coil. Modeling demonstrated, that accounting for grain orientated growth enabled improving the accuracy of texture composition calculation, its cube constituent, in particular.