A three-dimensional cellular automaton model for simulation of dendritic growth of magnesium alloy

doi:10.11890/1006-7191-123-169

Acta Metallurgica Sinica (English Letters) ›› 2012, Vol. 25 ›› Issue (3): 169-178.DOI: 10.11890/1006-7191-123-169

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A three-dimensional cellular automaton model for simulation of dendritic growth of magnesium alloy

Mengwu WU^1,2, Shoumei XIONG^1,2

1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2. State Key Laboratory of Automobile Safety and Energy, Tsinghua University, Beijing 100084, China
A numerical model based on the cellular automaton method for the three-dimensional simulation of dendritic growth of magnesium alloy was developed. The growth kinetics was calculated from the complete solution of the transport equations. By constructing a three-dimensional anisotropy model with the cubic CA cells, simulation of dendritic growth of magnesium alloy with six-fold symmetry in the basal plane was achieved. The model was applied to simulate the equiaxed dendritic growth and columnar dendritic growth under directional solidification, and its capability was addressed by comparing the simulated results to experimental results and those in the previously published works. Meanwhile, the three-dimensional simulated results were also compared with that of in two dimensions, offering a deep insight into the microstructure formation of magnesium alloy during solidification.

Online:2012-06-25 Published:2012-06-21
Contact: Shoumei XIONG

Abstract

Abstract: A numerical model based on the cellular automaton method for the three-dimensional simulation of dendritic growth of magnesium alloy was developed. The growth kinetics was calculated from the complete solution of the transport equations. By constructing a three-dimensional anisotropy model with the cubic CA cells, simulation of dendritic growth of magnesium alloy with six-fold symmetry in the basal plane was achieved. The model was applied to simulate the equiaxed dendritic growth and columnar dendritic growth under directional solidification, and its capability was addressed by comparing the simulated results to experimental results and those in the previously published works. Meanwhile, the three-dimensional simulated results were also compared with that of in two dimensions, offering a deep insight into the microstructure formation of magnesium alloy during solidification.

Key words: Magnesium alloy, Dendritic growth, Cellular automaton method;, Three-dimensional

Mengwu WU, Shoumei XIONG. A three-dimensional cellular automaton model for simulation of dendritic growth of magnesium alloy[J]. Acta Metallurgica Sinica (English Letters), 2012, 25(3): 169-178.

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A three-dimensional cellular automaton model for simulation of dendritic growth of magnesium alloy

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