Hot Rolling of a Non-heat Treatable Aluminum Alloy: Thermo-Mechanical and Microstructure Evolution Model

Abstract

A transient thermo-mechanically coupled Finite Element Method based model for single pass hot rolling of AA 5083 aluminum alloy is developed. The formulation is based on thermo-viscoplastic behavior expressed by the Perzyna constitutive equation and rolling under plane-strain conditions. The finite element model is integrated with a microstructural model where dynamic recrystallization through particle stimulated nucleation and static recrystallization is considered. The dynamic recrystallization model is an adoption of discontinuous dynamic recrystallization model while static recrystallization model is based on Avrami equation. The simulation results indicate that accurate estimates of constitutive behavior of the alloy, efficiency of conversion of plastic deformation to heat, and heat transfer at the roll/metal interface are critical for precise hot rolling model.