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Journal of Phase Equilibria and Diffusion

, Volume 38, Issue 3, pp 185–194 | Cite as

Lattice Instabilities and Phase Transformations in Fe from Atomistic Simulations

  • M. G. Di V. Cuppari
  • R. G. A. Veiga
  • H. Goldenstein
  • J. E. Guimarães Silva
  • C. S. Becquart
Article
  • 263 Downloads

Abstract

The stability of the body- and face-centered cubic lattices corresponding to the α and γ phases of Fe, respectively, as well as the transformation of one phase to the other were investigated by atomistic simulations. Two interatomic potentials were used: the embedded atom method (EAM) potential of Meyer and Entel and the bond order potential (BOP) developed by Müller et al. The suitability of the potentials for investigating structural transformations in Fe was verified using nonequilibrium free energy calculations and molecular dynamics simulations. The results showed that the EAM potential is capable of describing the bcc → fcc and fcc → bcc transformations whereas no transformation was observed for the computationally more expensive BOP potential with the simulation set up used.

Keywords

free energy calculations molecular dynamics phase transformations 

Notes

Acknowledgments

R. G. A. Veiga and J. E. Guimarães Silva gratefully acknowledge funding by FAPESP Grant 2014/10294-4. M. G. Di V. Cuppari was awarded a postdoctoral fellowship at Ecole Nationale Superieure de Chimie de Lille within the action CAPES/COFECUB 770/13. The authors would like to acknowledge computing time provided on the Blue Gene/Q supercomputer supported by the Research Computing Support Group (Rice University) and Laboratório de Computação Científica Avançada (Universidade de São Paulo).

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Copyright information

© ASM International 2017

Authors and Affiliations

  • M. G. Di V. Cuppari
    • 1
  • R. G. A. Veiga
    • 1
  • H. Goldenstein
    • 2
  • J. E. Guimarães Silva
    • 2
  • C. S. Becquart
    • 3
  1. 1.Universidade Federal do ABCSanto AndréBrazil
  2. 2.Escola Politécnica - Universidade de São PauloSão PauloBrazil
  3. 3.Unité Matériaux et Transformations, UMR CNRS 8207Ecole Nationale Supèrieure de Chimie de LilleVilleneuve d’Ascq CedexFrance

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