Numerical Simulation on Solidification Microstructure Evolution in Twin-roll Casting Process
Finite element method(FEM) was used to calculate the macro-transport phenomena in twin-roll casting process and cellular automation(CA) was applied to simulate the microstructure evolution in solidification.The coupling of CA with FEM,the nucleation and growth of grains and the microstructure evolution during solidification were simulated.On the basis of the CA-FEM method,the effects of the main parameters involving pouring temperature and casting speed on the solidification microstructure of twin-roll casting magnesium alloy AZ31B strip were studied,which provided a theoretical basis for the optimization of process parameters and the control of solidification structure.