Dresden 2006 – wissenschaftliches Programm
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MM: Metall- und Materialphysik
MM 13: Symposium Modern Metallic Materials Design III
MM 13.5: Vortrag
Dienstag, 28. März 2006, 11:45–12:00, IFW B
Effect of the S/L interface on the solidification of immiscible alloy — •Jie He1, Jiuzhou Zhao1, and Lorenz Ratke2 — 1Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, P R China — 2Institute for Space Simulation, DLR, Cologne 51147, Germany
Directional solidification experiments have been carried out for Al-Bi based immiscible alloys at different solidification rates. The morphology of the solid/liquid (S/L) interface and the possible interaction modes between the droplets and the interface were discussed. A numerical model has been developed based on the population dynamic approach to calculate the formation of the microstructure under the common actions of the minority phase nucleation, growth, droplet motion ahead of the interface and the interaction between the interface and the droplets. Calculations have been carried out according to the practical solidification conditions. The effect of the interaction between the interface and the droplets has been discussed. The calculated results agree well with the experimental ones. This work will favor further understanding the solidification process of immiscible alloys.