|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||J-5: Effect of Particle and Interfacial Energy on Morphology of Phases during Spinodal Decomposition
||Naveen Kumar, T.A. Abinandanan
|On-Site Speaker (Planned)
We have used phase field simulations to study the effect of immobile particles on microstructures produced by spinodal decomposition of alloys. We have used a ternary regular solution model, in which particles of C-rich γ phase are embedded in a homogeneous alloy that phase separates to produce A-rich α and B-rich β phases. By systematically varying the interfacial energies of α/β,α/γ,β/γ interfaces, we have studied systems in which the particle phase (a) exhibits a preference for the α phase, and (b) is neutral towards α and β phases. When the particle phase has a preference for one of the product phases, two or three alternating annular rings of α and β phases appear around the particle during the early stages; these rings, however, disintegrate over time. Bicontinuous microstructures are observed in alloys in which the minority phase volume fraction is as low as 35 %.
||Planned: A print-only volume