Numerically-quantified two dimensionality of microstructure evolution accompanying variant selection of FePd

N. Ueshima, M. Yoshiya, H. Yasuda, T. Fukuda, T. Kakeshita

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Through three-dimensional (3D) simulations of microstructure evolution by phase-field modeling (PFM), microstructures have been quantified during their time evolution by an image processing technique with particular attention to the shape of variants in the course of variant selection. It is found that the emerging variants exhibit planar shapes rather than 3D shapes due to the elastic field around the variants arising upon disorder-to-order transition to the L10 phase. The two-dimensionality is more pronounced as variant selection proceeds. Although three equivalent variants compete for dominance under an external field, one of the three variants vanishes before final competition occurs between the remaining variants, which can be explained by the elastic strain energy. These numerical analyses provide better understanding of the microstructure evolution in a more quantitative manner, including the small influence of the third variant, and the results obtained confirm that the understanding of variant selection obtained from two-dimensional (2D) simulations by PFM is valid.

Original languageEnglish
Article number076502
JournalMaterials Research Express
Volume2
Issue number7
DOIs
Publication statusPublished - 2015 Jul

Keywords

  • 3D image analysis
  • Micromechanics
  • Microstructure formation
  • Phase-field modelling
  • Variant selection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

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