Second-phase nucleation on an edge dislocation

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Second-phase nucleation on an edge dislocation

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Publication Article, peer reviewed scientific
Title Second-phase nucleation on an edge dislocation
Author(s) Massih, Ali
Date 2011
English abstract
A model for nucleation of second phase at or around dislocation in a crystalline solid is considered. The model employs the Ginzburg-Landau theory of phase transition comprising the sextic term in order parameter in the Landau free energy. The ground state solution of the linearized time-independent Ginzburg-Landau equation has been derived, through which the spatial variation of the order parameter has been delineated. Moreover, a generic phase diagram indicating a tricritical behavior near and away from the dislocation is depicted. The relation between the classical nucleation theory and the Ginzburg-Landau approach has been discussed, for which the critical formation energy of nucleus is related to the maximal of the Landau potential energy. A numerical example illustrating the application of the model to the case of nucleation of hydrides in zirconium alloys is provided.
DOI (link to publisher's fulltext)
Publisher Taylor & Francis
Host/Issue Philosophical Magazine;
Volume 91
ISSN 1478–6435
Pages 3961-3980
Language eng (iso)
Subject(s) heterogeneous nucleation
edge dislocations
Ginzburg–Landau theory
Research Subject Categories::NATURAL SCIENCES
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