Defects and multistability in eutectic solidification patterns

Abstract

We use three-dimensional phase-field simulations to investigate the dynamics of the two-phase composite patterns formed upon during solidification of eutectic alloys. Besides the spatially periodic lamellar and rod patterns that have been widely studied, we find that there is a large number of additional steady-state patterns which exhibit stable defects. The defect density can be so high that the pattern is completely disordered, and that the distinction between lamellar and rod patterns is blurred. As a consequence, the transition from lamellae to rods is not sharp, but extends over a finite range of compositions and exhibits strong hysteresis. Our findings are in good agreement with experiments.

6 pages, 8 figures

References in corpus (4)

• Quantitative phase-field modeling of two-phase solidification
• Towards a quantitative phase-field model of two-phase solidification
• Pattern Stability and Trijunction Motion in Eutectic Solidification
• Instabilities and disorder of the domain patterns in the systems with competing interactions

Cited by in corpus (4)

• Theoretical and numerical study of lamellar eutectic three-phase growth in ternary alloys
• Simulation of dendritic-eutectic growth with the phase-field method
• Pseudo-4D view of the growth and form of locked eutectic colonies
• Spacing Homogenization in Lamellar Eutectic Arrays with Anisotropic Interphase Boundaries