Theoretical predictions and experimental verification of surface grain structure evolution for AA6061 during hot rolling

摘要

Finite element modeling of a hot-rolled 6061 aluminum alloy was performed with the software package DEFORM~(? )2-D in order to predict the localized state variables: temperature, strain, strain rate and stress. The state variables were then incorporated into a new dynamic recrystallization (DRX) model that considers both continuous dynamic recrystallization and geometric dynamic recrystalliza-tion to predict grain structure evolution near the rolled surface. The performed DRX simulation was verified by experimental results from hot-torsion and hot-rolling experiments from the literature. The recrystallized grain structure evolution along the surface of hot-rolled AA6061 was predicted with reasonable accuracy.