Role of Solid�Solid Interfacial Energy Anisotropy in the Formation of Broken Lamellar Structures in Eutectic Systems

Khanna, S and Aramanda, SK and Choudhury, A (2020) Role of Solid�Solid Interfacial Energy Anisotropy in the Formation of Broken Lamellar Structures in Eutectic Systems. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 51 (12). pp. 6327-6345.

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Abstract

Eutectic solidification gives rise to a wide range of microstructures. A commonly observed morphology is the periodic arrangement of lamellar plates with well-defined orientations of the solid�solid interface in a given eutectic grain. It is typically believed that this form of morphology develops due to the presence of solid�solid interfacial energy anisotropy. In this paper, we provide evidence using phase-field simulations where our focus is on alloys where the minority phase fraction is low. Our aim is to establish the role of solid�solid interfacial energy anisotropy in the stabilization of broken lamellar structures in such systems in contrast to the formation of a rod microstructure. In this regard, we conduct phase-field simulations for different strengths of anisotropy in both constrained and extended settings, using which we clarify the mechanisms by which a lamellar arrangement gets stabilized in the presence of anisotropy in the solid�solid interfacial energy. © 2020, The Minerals, Metals & Materials Society and ASM International.

Item Type:	Journal Article
Publication:	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Publisher:	Springer
Additional Information:	Copyright to this art5icle belongs to Springer
Keywords:	Anisotropy; Eutectics; Interfacial energy; Morphology; Setting, Eutectic grains; Eutectic solidification; Eutectic system; Interfacial energy anisotropies; Lamellar plates; Phase-field simulation; Rod microstructure; Solid interfaces, Lamellar structures
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	26 Nov 2020 10:18
Last Modified:	26 Nov 2020 10:18
URI:	http://eprints.iisc.ac.in/id/eprint/66851

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