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

S. Y. Hu, Long-qing Chen

Research output: Contribution to journalArticle

31 Citations (Scopus)

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

Fingerprint

Diffuse Interface
Defects
defects
Dislocation
Chemical analysis
Modeling
Inhomogeneity
inhomogeneity
Eigenstrain
Phase interfaces
Cahn-Hilliard Equation
Phase Field Model
edge dislocations
Segregation
Stress Field
Nucleation
Spatial Distribution
Slip
Spatial distribution
stress distribution

All Science Journal Classification (ASJC) codes

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

Cite this

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Diffuse-interface modeling of composition evolution in the presence of structural defects. / Hu, S. Y.; Chen, Long-qing.

In: Computational Materials Science, Vol. 23, No. 1-4, 01.04.2002, p. 270-282.

Research output: Contribution to journalArticle

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