Diffuse-interface modeling of composition evolution in the presence of structural defects

S. Y. Hu, L. Q. Chen

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

A diffuse-interface phase field model is described for modeling the interactions between compositional inhomogeneities and structural defects. The spatial distribution of these structural defects is described by the space-dependent eigenstrains. It takes into account the effect of the coherency elastic energy of a compositional inhomogeneity, and the elastic coupling between the coherency strains and defect strains. The temporal evolution of composition is described by the Cahn-Hilliard equation. Particularly, the solute segregation, and nucleation and growth around dislocation slip bands and crack-like condensed interstitial dislocation loops are discussed. The effect of nucleated coherent precipitates on the stress field around these defects is analyzed.

Original languageEnglish (US)
Pages (from-to)270-282
Number of pages13
JournalComputational Materials Science
Volume23
Issue number1-4
DOIs
StatePublished - Apr 1 2002

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Computational Mathematics

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