Numerical simulation of dendrite growth and microsegregation formation of binary alloys during solidification process |
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| Authors: | Li Qiang Guo Qiao-Yi and Li Rong-De |
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| Affiliation: | School of Material Science and Engineering, Shenyang University of Technology, Shenyang 110023, China; Shenyang Ligong University, Shenyang 110168, China |
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| Abstract: | The dendrite growth and solute microsegregation of Fe-C
binary alloy are simulated during solidification process by using cellular
automaton method. In the model the solid fraction is deduced from the
relationship among the temperature, solute concentration and curvature of
the solid/liquid interface unit, which can be expressed as a quadric
equation, instead of assuming the interface position and calculating the
solid fraction from the interface velocity. Then by using this model a dendrite
with 0 and 45 degree of preferential growth direction are simulated
respectively. Furthermore, a solidification microstructure and solute
microsegregation are simulated by this method. Finally, different
Gibbs-Thomson coefficient and liquid solute diffusing coefficient are
adopted to investigate their influences on the morphology of dendrite. |
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| Keywords: | dendrite simulation cellular automaton solidification |
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