Martensitic embryo formation at dislocations near surfaces

A. C.E. Reid*, G. B. Olson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A two-dimensional continuum model for heterogeneous nucleation of martensite is studied. This nonlinear, nonlocal Landau-type model incorporates slip dislocations into the continuum picture. The elastic strain field of the dislocations occurs in the context of a strongly nonlinear host matrix which models a structural phase transformation. This matrix has more than one stress-free strain. Martensitic embryo structures are observed at temperatures which are much higher than the equilibrium temperature between the parent and product phases. The structure of the embryo as a function of temperature, and the interaction with a nearby free surface which allows for the abrupt appearance of surface relief, are examined.

Original languageEnglish (US)
Pages (from-to)257-261
Number of pages5
JournalMaterials Science and Engineering A
Volume273-275
DOIs
StatePublished - Dec 15 1999

Keywords

  • Dislocation
  • Heterogeneous nucleation
  • Martensite
  • Surface relief

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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