Numerical simulation of microstructure evolution of Al alloys in centrifugal casting

A coupled stochastic model has been developed for the prediction of solidif ication grain structures in centrifugal casting. The present model consists of two schemes: the cellular automaton to simulate the evolution of solidi fication structure and the finite volume method to calculate the heal trans fer. The present model has been applied to predict the evolution of solidif ication structures in centrifugal casting of Ai alloys. The effects of mold rotation velocity, solute concentration, melt superheat and mold preheatin g temperature on solidification structures were investigated. in addition, the evolution of dendritic microstructures was also simulated using a modif ied cellular automaton model. The simulated results were in good agreement with those obtained experimentally.