Effect of co-existing external fields on a binary spinodal system: A phase-field study. (September 2019)

• Record Type: Journal Article
• Authors: Chafle, Rupesh; Bhowmick, Somnath; Mukherjee, Rajdip
• Is Part Of: Journal of physics and chemistry of solids. Volume 132(2019)
• Page Start: 236
• Page End: 243
• Publication Date: 2019-09
• Subjects: Magnetic field -- Elastic field -- Phase-field model -- Spinodal decomposition; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2019.04.025
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: We develop a phase-field model, integrating both micromagnetic and microelastic approaches. The model can capture the impact of eigen strain, applied stress and elastic inhomogeneity on the microstructure evolution in presence of an externally applied magnetic field. We use the model to simulate bicontinuous microstructure evolution during spinodal decomposition, with co-existing paramagnetic and ferromagnetic phases. The simulations confirm that the ferromagnetic phase tends to align itself in the direction of the applied magnetic field. Depending on elastic inhomogeneity, we also observe preferential alignment parallel or perpendicular to the applied stress. When these two fields are applied together, the alignment of the phases can precisely be controlled by changing strength and direction of either of the two. Graphical abstract: Image 1 Highlights: Microstructure evolution in a two phase binary alloy is studied using phase-field simulations. The effect of magnetic and elastic fields on the microstructure evolution is investigated. The interplay between these two fields, when acting simultaneously, provides an insight into controlling the microstructure evolution. Detailed parametric analysis gives a complete picture of eigen strain, applied stress and elastic inhomogeneity contributions.