Ginzburg-Landau-Type Multiphase Field Model for Competing fcc and bcc Nucleation

Toth, G. I.; Morris, James R.; Granasy, L.

doi:10.1103/PhysRevLett.106.045701

Title: Ginzburg-Landau-Type Multiphase Field Model for Competing fcc and bcc Nucleation

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.106.045701· OSTI ID:1008839

Toth, G. I. ^[1];

^[2]; Granasy, L. ^[3]

Research Institute for Solid State Physics and Optics, Hungary
ORNL
Research Institute for Solid State Physics and Optics, Hungary and Brunel University, UK

We address crystal nucleation and fcc-bcc phase selection in alloys using a multiphase field model that relies on Ginzburg-Landau free energies of the liquid-fcc, liquid-bcc, and fcc-bcc subsystems, and determine the properties of the nuclei as a function of composition, temperature, and structure. With a realistic choice for the free energy of the fcc-bcc interface, the model predicts well the fcc-bcc phase-selection boundary in the Fe-Ni system.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1008839

Journal Information:: Physical Review Letters, Vol. 106, Issue 4; ISSN 0031-9007

Country of Publication:: United States

Language:: English

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