Interfacial free energy anisotropy driven faceting of precipitates

Roy, Arijit and Nani, E S and Lahiri, Arka and Gururajan, M P (2017) Interfacial free energy anisotropy driven faceting of precipitates. In: PHILOSOPHICAL MAGAZINE, 97 (30, A). pp. 2705-2735.

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Abstract

During solid-solid precipitation, interface free energy anisotropy is known to drive faceting of precipitates. In this paper, using a recently developed phase field formulation based on higher order tensor terms, we develop and implement a family of phase field models and indicate the parameter choices which lead to faceted precipitate morphologies. We also indicate how to choose the parameters given either the known precipitate morphology or the interfacial free energy anisotropy. Specifically, we study the faceting of precipitates in systems with cubic and hexagonal anisotropies; in 2 and 3D implementation of our phase field model, the precipitates do show facets in accordance with the Wulff plot - including cases where the Wulff plot predicts facets made up of more than one family of planes. We also indicate the possible extensions of our model to study other problems of interest.

Item Type:	Journal Article
Publication:	PHILOSOPHICAL MAGAZINE
Additional Information:	Copy right for this article belongs to the TAYLOR & FRANCIS LTD, 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	07 Oct 2017 06:06
Last Modified:	07 Oct 2017 06:06
URI:	http://eprints.iisc.ac.in/id/eprint/57995

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