Multiphase field modeling the eutectic growth under varying  velocity

Acta Metall Sin

2007, Vol. 43

Issue (2): 194-198 DOI:

Research Articles

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Multiphase field modeling the eutectic growth under varying velocity

;WANG Jin-cheng;

西北工业大学凝固技术国家重点实验室

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WANG Jin-cheng. Multiphase field modeling the eutectic growth under varying velocity. Acta Metall Sin, 2007, 43(2): 194-198 .

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Abstract By multiphase field model, the stable and non-stable growth of eutectic CBr4-C2Cl6 alloy is simulated. The simulated results of stable growth are accordant with Jackson-Hunt’s eutectic theory，which proved that the model is reliable. As to the non-stable growth under varying growth velocity, the results show that, during step increase or step decrease in velocity, the mechanism of the lamellar spacing adjustment is through abrupt lamellar branching or progressive merging and annihilation accompanied the growing up by itself, respectively, moreover, there exists strong asymmetry between these two processes during lamellar adjustment. At the moment of step changing in velocity, the adjustment of lamellar spacing, the average velocity and the average interface undercooling characterize the hysteresis effect.

Key words: eutectic multiphase field directional solidification growth at varying velocity

Received: 29 May 2006

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