Modeling of solidification microstructures based on fully coupling of macro-transport phenomena with cellular automata

Abstract

Abstract: This paper has attempted to simulate the microstructure formation based on fully coupling of temperature field, concentration field and velocity field with micro-kinetics. The authors presented a new way, which is the combination of FDM and cellular automata (CAFD) to visualize the microstructure formation of the thin complex superalloy turbine blades cast by the vacuum investment process. The distribution, orientation and mechanism of the heterogeneous nucleation, the growth kinetics of dendrites and the columnar to equiaxed transition (CET) are considered. Capitalizing on these simulating schemes, the comprehensive influence of key process variables on the scale and uniformity of grains has been investigated quantitatively. The simulated grain size and morphology agree well with the experimental results.

Key words:

Qiang DU, DianZhong LI, Yiyi LI. Modeling of solidification microstructures based on fully coupling of macro-transport phenomena with cellular automata[J]. J Mater Sci Technol, 2000, 16(06): 568-572.

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Modeling of solidification microstructures based on fully coupling of macro-transport phenomena with cellular automata

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