The growth of a single cell/dendrite in a directional solidification process

TitleThe growth of a single cell/dendrite in a directional solidification process
Publication TypeJournal Article
Year of Publication2007
AuthorsLu SZ, Liu S
Journal TitleMetallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Volume38A
Pages1378-1387
Date PublishedJul
Type of ArticleProceedings Paper
ISBN Number1073-5623
Accession NumberISI:000248511300002
Keywordsalloys, ARRAY, cell, SPACINGS, VELOCITY
Abstract

Following the original model for a single cell/dendrite growth by Hunt, [51 systematic numerical simulations are carried out with focus on cell shape evolution and tip radius selection in a directional solidification process conducted in a capillary tube. Computations indicate that the anisotropy of solid/liquid interfacial energy and the diameter of a capillary tube have significant influences on the selection of a tip shape. The anisotropy in dilute SCN-salol alloys has been determined through the equilibrium droplet shape method and its value is 1.09 pct. The calculated cell/dendrite shapes with this value of anisotropy agree with experimental observations where a single cell/dendrite of SCN-salol alloys grows in a capillary tube.

DOI10.1007/s11661-006-9024-2
Alternate JournalMetall. Mater. Trans. A-Phys. Metall. Mater. Sci.