Journal
SCRIPTA MATERIALIA
Volume 58, Issue 2, Pages 106-109Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.09.022
Keywords
solidification; metals; thermodynamics; kinetics; modelling
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In an extension of a recently developed model [M. Buchmann, M. Rettenmayr, Scripta Mater. 57 (2007) 169] non-equilibrium transients during solidification of a binary metal alloy are studied. Interface velocity and interface concentrations are calculated during the transient towards interface equilibrium in an undercooled alloy. The rigorously derived model includes realistic free energies and real concentration gradients in both phases. The evolution of the interface concentrations and velocity is modelled as a function of the initial driving force on the phase boundary. The time necessary for re-equilibration of the interface is quantified. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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