A model for recrystallisation kinetics, texture and grain size applied to multipass hot rolling of an AlMgMn aluminium alloy

Abstract

A physically based model for primary recrystallisation, including recrystallisation kinetics, grain size and texture evolution, during hot rolling of aluminium is presented. The model is based on extensive experimental investigations that have been directed towards identifying the nature of the nucleation sites for recrystallised grains of different crystallographic orientations. Particle stimulated nucleation and nucleation from cube bands and grain boundary regions have been incorporated in the model. The model has been applied to the hot rolling of an AlMgMn alloy processed in 13 passes. Reasonable model predictions have been obtained for cases of reversing rolling and a 3-stand tandem mill, including variations in the exit gauge temperature.