Solute trapping during rapid solidification of binary alloys: A phase- field study

Denis Danilov

Hochschule Karlsruhe - Technik und Wirtschaft, Institut für Angewandte Forschung, Karlsruhe, Germany

The effect of nonequilibrium solute trapping by growing solid under rapid solidification conditions is studied by a phase-field model. Considering a continuous steady-state concentration profile across the diffuse solid-liquid interface, a definition of the nonequilibrium partition coefficient in the phase-field context is introduced, which leads to a better description of the available experimental data, especially at high growth velocities, in comparison with other diffuse-interface predictions.

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