A crystallographic model of fcc/bcc martensitic nucleation and growth

J. B. Yang, Z. G. Yang, Y. Nagai, M. Hasegawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A crystallographic model of face-centered cubic/body-centered cubic martensitic nucleation and growth has been developed in which the glissile martensitic interface is described in terms of discrete transformation and misfit dislocations within the framework of the Frank-Bilby equation. In the present model heterogeneous nucleation of a martensitic embryo occurs spontaneously by dissociation of an existing perfect dislocation under certain conditions, such as the catalysis on grain boundaries. Autocatalytic dislocation is proposed to be responsible for embryo growth, then nucleation and subsequent growth of a single embryo can be regarded as an autocatalytic process. As a natural result the crystallographic features of grown martensite are consistent with the phenomenological theory of martensite crystallography. Martensitic nucleation in this model agrees with many experimental observations.

Original languageEnglish
Pages (from-to)1599-1606
Number of pages8
JournalActa Materialia
Volume58
Issue number5
DOIs
Publication statusPublished - 2010 Mar 1

Keywords

  • Analytical methods
  • Heterogeneous nucleation of phase transformations
  • Martensitic phase transformation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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