Quantitative phase-field modeling of directional growth with kinetic effects in quasi-rapid solidification

Abstract

Directional growth in quasi-rapid solidification was simulated by using a quantitative phase-field model to investigate the roles of the kinetic effects on the growth pattern selection and solute segregation. A convergence study was carried out to choose proper the interface thickness in numerical simulations. Results show that the stable range of primary spacing with kinetic effects is larger than that without them. The inclusion of the kinetic effects leads to the solute enrichment in the interdendritic region, indicating that kinetic effects can be involved in phase-field simulations for accurate predicted results.