Abstract This paper simulates the dendrite growth process during non-isothermal solidification in the Al--Cu binary alloy by using the phase-field model. The heat transfer equation is solved simultaneously. The thermodynamic and kinetic parameters are directly obtained from existing database by using the Calculation of Phase Diagram (CALPHAD) method. The effects of the latent heat and undercooling on the dendrite growth, solute and temperature profile during the solidification of binary alloy are investigated. The results indicate that the dendrite growing morphologies could be simulated realistically by linking the phase-field method to CALPHAD. The secondary arms of solidification dendritic are better developed with the increase of undercooling. Correspondingly, the tip speed and the solute segregation in solid--liquid interface increase, but the tip radius decreases.
Received: 05 February 2007
Revised: 20 September 2007
Accepted manuscript online:
Fund: Project supported by Research
Center of Material Science and Engineering of Jiangxi Province,
China (Grant No ZX200301017).
Cite this article:
Long Wen-Yuan(龙文元), Xia Chun(夏春), Xiong Bo-Wen(熊博文), and Fang Li-Gao(方立高) Phase-field simulation of dendritic growth in a binary alloy with thermodynamics data 2008 Chin. Phys. B 17 1078
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