TESTS OF THEORIES FOR NONPLANAR GROWTH DURING RAPID ALLOY SOLIDIFICATION

摘要

During rapid solidification, kinetically suppressed solute partitioning at the crystal/melt interface, as well as kinetic interfacial undercooling, become important. Both of these effects have significant stabilizing influences on a planar interface during rapid solidification. We review experimental tests we have performed of models for the transition from planar to cellular growth, and for the velocity-undercooling function of the dendrite tip, in the velocity regime where nonequilibrium interface kinetics are important.