Phase-field investigation of rod eutectic morphologies under geometrical confinement - Archive ouverte HAL
Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2011

Phase-field investigation of rod eutectic morphologies under geometrical confinement

Résumé

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 (alpha) 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 alpha > 10 degrees, 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 lambda m), and the advent of rod eliminations at low spacings. Furthermore, a transition from rod to lamellar structures is observed for alpha < 10 degrees for the phase fraction of 10.5% used in the present paper.

Dates et versions

hal-01239026 , version 1 (07-12-2015)

Identifiants

Citer

Melis Serefoglu, R. E. Napolitano, Mathis Plapp. Phase-field investigation of rod eutectic morphologies under geometrical confinement. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2011, 84 (1, 1), pp.011614. ⟨10.1103/PhysRevE.84.011614⟩. ⟨hal-01239026⟩
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