Precipitate growth with composition-dependent diffusivity: Comparison between theory and phase field simulations

Mukherjee, R and Abinandanan, TA and Gururajan, MP (2010) Precipitate growth with composition-dependent diffusivity: Comparison between theory and phase field simulations. In: Scripta Materialia, 62 (2). pp. 85-88.

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Abstract

We consider the growth of an isolated precipitate when the matrix diffusivity depends on the composition. We have simulated precipitate growth using the Cahn-Hilliard model, and find good agreement between our results and those from a sharp interface theory for systems with and without a dilatational misfit. With misfit, we report (and rationalize) an interesting difference between systems with a constant diffusivity and those with a variable diffusivity in the matrix.

Item Type:	Journal Article
Publication:	Scripta Materialia
Publisher:	Elsevier Science
Additional Information:	copyright of this article belongs to Elsevier Science.
Keywords:	Phase field modeling;Phase transformation kinetics; Precipitation.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	09 Jan 2010 09:34
Last Modified:	22 Feb 2012 08:16
URI:	http://eprints.iisc.ac.in/id/eprint/25298

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