Document Type

Article

Publication Date

7-29-2011

Journal or Book Title

Physical Review E

Volume

84

First Page

011614

DOI

10.1103/PhysRevE.84.011614

Abstract

Three-dimensional phase-field simulations are employed to investigate rod-type eutectic growth morphologies in confined geometry. Distinct steady-state solutions are found to depend on this confinement effect with the rod array basis vectors and their included angle (α) changing to accommodate the geometrical constraint. Specific morphologies are observed, including rods of circular cross sections, rods of distorted (elliptical) cross sections, rods of peanut-shaped cross-sections, and lamellar structures. The results show that, for a fixed value of α>10∘, the usual (triangular) arrays of circular rods are stable in a broad range of spacings, with a transition to the peanut-shaped cross sectioned rods occurring at large spacings (above 1.5 times the minimum undercooling spacing λm), and the advent of rod eliminations at low spacings. Furthermore, a transition from rod to lamellar structures is observed for α<10∘ for the phase fraction of 10.5% used in the present paper.

Comments

This article is from Physical Review E 84 (2011): 011614, doi:10.1103/PhysRevE.84.011614.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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