The forming process of microstructure of TiAl alloys under normal solidification condition was simulated. 2D mathematical models of the macroscopic heat transfer and equiaxed dendritic growth were established. The solidification process was numerically computed by using a modified cellular automation coupled with finite difference method. The results show that primary β phase morphology is in good agreement with experimental result. On the center region of low cooling rate, a dendrite easily grows into spin...
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