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Kinetic study of phase transformation in a highly concentrated Fe-Cr alloy: Monte Carlo simulation versus experiments
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2011 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 59, no 6, 2404-2411 p.Article in journal (Refereed) Published
Abstract [en]

An atomic scale analysis of phase separation in a thermally aged Fe-25 at.% Cr alloy at 500 degrees C using 3-D atom probe (3DAP) and atomistic kinetic Monte Carlo (AKMC) simulation is presented. Treatment of the simulation data with the Lifshitz Slyozov Wagner and Huse laws shows that, whereas diffusion along the interfaces and through the bulk both occur at early stages, diffusion through the matrix quickly controls the growth of domains whereas the structure is still interconnected. Comparison of AKMC results with experimental ones showed that AKMC simulation in the two-band model approximation on a rigid lattice is able to reproduce the behaviour of the concentration field and of the width of the domains observed with 3DAP. This comparison also strongly support that, in real Fe Cr alloys, as well as in simulated systems, diffusion is predominantly through the bulk and controls the growth of domains, while the structure is still interconnected.

Place, publisher, year, edition, pages
2011. Vol. 59, no 6, 2404-2411 p.
Keyword [en]
Iron alloys, Monte Carlo techniques, Atom-probe field-ion microscopy (AP-FIM), Phase transformation, Coarsening
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-62821DOI: 10.1016/j.actamat.2010.12.038ISI: 000288568500015OAI: diva2:481255
QC 20120124Available from: 2012-01-20 Created: 2012-01-20 Last updated: 2012-01-24Bibliographically approved

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Olsson, Pär
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