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Phase transformations involving ordering and phase separation: a Monte Carlo study

Abinandanan, TA and Haider, F and Martin, G (1995) Phase transformations involving ordering and phase separation: a Monte Carlo study. In: Non Linear Phenomena in Materials Science III. Instabilities and Patterning. Indo-French Workshop on Instabilities and Patterning and of the International Meeting on Non Linear Phenomena in Materials Science, Dec. 1994, Switzerland, pp. 87-95.

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Official URL: http://www.scientific.net/SSP.42-43.87

Abstract

We have used a novel Monte Carlo (MC) scheme for studying diffusional phase transformations. The alloy model takes into account, explicitly, the presence of vacancies and atom transport is through migration of these vacancies. This alloy model, along with a stochastic formulation of vacancy jumps, also leads to a physically meaningful definition of time in the MC simulations. We have used this MC scheme to study precipitation of an $L1_2$ ordered phase from a supersaturated, disordered fcc matrix. Our results show that phase separation and atomic ordering take place simultaneously. This conclusion appears to be valid even for a concentrated alloy, in which atomic ordering is predicted (by a mean field thermodynamic analysis) to occur before phase separation

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Trans Tech Publications Inc..
Keywords: Atomic Ordering;Monte-Carlo Simulation;Phase Separation; Phase Transformation
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 18 Sep 2007
Last Modified: 11 Jan 2012 06:20
URI: http://eprints.iisc.ernet.in/id/eprint/10930

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