A Phase-Field Model for Rapid Solidification with Non-Equilibrium Solute Diffusion

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Since the growth velocity can be comparable with or even larger than the solute diffusion velocity in the bulk phases, modeling of rapid solidification with non-equilibrium solute diffusion becomes quite an important topic. In this paper, an effective mobility approach was proposed to derive the current phase field model (PFM). In contrast with the previous PFMs that were derived by the so-called kinetic energy approach, diffusionless solidification happens not only in the bulk phases but also inside the interface when the growth velocity is equal to the solute diffusion velocity in liquid. A good agreement between the model predictions and experimental results is obtained for rapid solidification of Si-9at.%As alloy.

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Edited by:

Prof. Yafang Han, Xuefeng Liu and Ying Wu

Pages:

14-20

Citation:

H. F. Wang et al., "A Phase-Field Model for Rapid Solidification with Non-Equilibrium Solute Diffusion", Materials Science Forum, Vol. 817, pp. 14-20, 2015

Online since:

April 2015

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$38.00

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