Simulation of Dendritic Growth with Melt Convection in Solidification of Ternary Alloys
SUN Dong-Ke1** , ZHANG Qing-Yu2 , CAO Wei-Sheng3 , ZHU Ming-Fang2
1 Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 2002402 Jiangsu Key Laboratory for Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 2111893 CompuTherm LLC, 437 S. Yellowstone Dr., Madison 53719, USA
Abstract ：A cellular automaton-lattice Boltzmann coupled model is extended to study the dendritic growth with melt convection in the solidification of ternary alloys. With a CALPHAD-based phase equilibrium engine, the effects of melt convection, solutal diffusion, interface curvature and preferred growth orientation are incorporated into the coupled model. After model validation, the multi dendritic growth of the Al-4.0 wt%Cu-1.0 wt%Mg alloy is simulated under the conditions of pure diffusion and melt convection. The result shows that the dendritic growth behavior, the final microstructure and microsegregation are significantly influenced by melt convection in the solidification.
收稿日期: 2014-10-02
出版日期: 2015-06-30
:
81.10.Aj
(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
81.30.Fb
(Solidification)
47.11.-j
(Computational methods in fluid dynamics)
47.54.-r
(Pattern selection; pattern formation)
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2015, Vol. 32 
