The evolution of solidification microstructures in ternary metallic alloys is
investigated by adaptive finite element simulations of a general multicomponent
phase-field model. A morphological transition from dendritic to globular growth
is found by varying the alloy composition at a fixed undercooling. The
dependence of the growth velocity and of the impurity segregation in the solid
phase on the composition is analyzed and indicates a smooth type of transition
between the dendritic and globular growth structures.Comment: 4 pages, 2 figure