Monte Carlo simulation of simultaneous ordering and precipitation in BCC lattice

M. Athèns, Pascal Bellon, G. Martin, F. Haider

Research output: Contribution to journalArticlepeer-review

Abstract

Fe-Al system quenched into its two-phase field undergoes a phase separation leading to the coexistence of A2 and B2 phases. Using transmission electron microscopy, three decomposition behaviour have been reported with increasing aluminium concentration: nucleation-growth of B2 inside a disordered matrix, decomposition of interconnected ordered phases which was attributed to spinodal decomposition, and nucleation-growth of A2 inside B2 domains. This work presents the first Monte Carlo simulations of simultaneous phase seperation and ordering in a two-phase A2/B2 domain. Calculations were performed using an Atomistic Kinetic Model; one vacancy allows atomic diffusion and a residence time algorthm is used. The three experimentally observed morphologies of evolution are reproduced. Moreover decomposition kinetics is compatible with the classical Lifeshits-Slyosow-Wagner coarsening thoery.

Original languageEnglish (US)
JournalJournal De Physique. IV : JP
Volume6
Issue number2
StatePublished - Mar 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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