Application of cellular automata simulations to modelling of dynamic recrystallization

Abstract

The cellular automaton computer simulation technique has been applied to the problem of dynamic recrystallization. The model is composed of simple microstructural mechanisms - such as evolution of dislocation density, grain boundary movement and nucleation - that acting together result in complex macrostructural response expressed by evolution of flow stress and grain size. A strong sensitivity of the flow stress curves to the initial grain size and nucleation rate is observed. Simulations lead to the conclusion that model of a dynamically recrystallizing material has a strong structural memory resulting in wide variety of experimentally observed responses. © 2002 Springer-Verlag Berlin Heidelberg.