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

G. I. Tóth, J. R. Morris, and L. Gránásy

Phys. Rev. Lett. 106, 045701 – Published 24 January 2011

Abstract

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.

Received 21 June 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.045701

Authors & Affiliations

G. I. Tóth¹, J. R. Morris², and L. Gránásy^1,3

¹Research Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, Hungary
²Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
³BCAST, Brunel University, Uxbridge, Middlesex, UB8 3PH, United Kingdom