期刊
COMPUTATIONAL MATERIALS SCIENCE
卷 23, 期 1-4, 页码 270-282出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0927-0256(01)00206-3
关键词
nucleation; composition segregation; defects; phase field; continuously distributed dislocations; microstructure
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 hands and crack-like condensed interstitial dislocation loops are discussed. The effect Of nucleated coherent precipitates on the stress field around these defects is analyzed. (C) 2002 Elsevier Science B.V. All rights reserved.
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