Phys. Rev. Lett. 93, 215501 (2004) [4 pages]Dendritic to Globular Morphology Transition in Ternary Alloy SolidificationReceived 3 June 2004; published 15 November 2004 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.215501
DOI:
10.1103/PhysRevLett.93.215501
PACS:
81.10.Aj, 61.66.Dk, 68.70.+w, 81.30.Fb
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