Question

A phase-field model for rapid solidification with non-equilibrium solute diffusion

Answer 1

Source: Materials Science Forum . 2015, Vol. 817, p14-20. 7p.Author(s): Haifeng Wang; Cun Lai; Xiao Zhang; Kuang Wang; Feng Liu

Abstract: 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.Copyright of Materials Science Forum is the property of Trans Tech Publications, Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the materia