Simulation of Ingot Solidification Microstructure Evolution of Cu-3Ni-0.96Si-0.15Mg Alloy Based on CAFE
CAFE(cellular automaton finite element method)model in ProCast software was used to simulate and calculate the dendrite microstructure evolution during solidification of Cu-3Ni-0.96Si-0.15Mg ingot,and the predicted solidification microstructure was compared with the experimental microstructure to verify the accuracy of the model.The results show that the solidified microstructure predicted by the simulation is basically consistent with the experiments,indicating that the model can simulate the actual solidified microstructure very well.Then,the effect of the overheat temperature and the nucleation density on the ingot solidification microstructure was studied.The results show that increasing the nucleation rate and reducing the pouring temperature can obviously refine grain size.When the overheat temperature is 20℃and the maximum nucleation density is 1×109 m-3,the solidification structure of the ingot is almost the equiaxed grain structure,and the ratio of the equiaxed grain zone is about 92.34%.
Cu-3Ni-0.96Si-0.15Mg alloysolidification structurenumerical simulationCAFE model
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