2009 Volume 49 Issue 8 Pages 1156-1160
Some computational results on dendritic growth in binary alloy are obtained by using a phase–field model coupled the solute gradient term. The effect of crystalline anisotropy on the morphological formation, tip steady state and the solute partition is investigated for different dendrites. The interface formation and tip steady state are affected evidently with increase in anisotropy for ‹100› dendrite growth, but the solute partition coefficient is not significantly influenced. For ‹110› preferred growth directions, when the anisotropy strength is lower than the critical value, the tip velocity of  direction is lower than  and  directions. As the anisotropy strength crosses the critical value, the tip velocity of  direction increases suddenly, larger than the tip velocity of  and  directions, showing strong solute trapping.