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

S. Y. Hu; L. Q. Chen

doi:10.1016/S0927-0256(01)00206-3

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

S. Y. Hu, L. Q. Chen

Research output: Contribution to journal › Article › peer-review

40 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 language	English (US)
Pages (from-to)	270-282
Number of pages	13
Journal	Computational Materials Science
Volume	23
Issue number	1-4
DOIs	https://doi.org/10.1016/S0927-0256(01)00206-3
State	Published - Apr 2002

All Science Journal Classification (ASJC) codes

General Computer Science
General Chemistry
General Materials Science
Mechanics of Materials
General Physics and Astronomy
Computational Mathematics

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10.1016/S0927-0256(01)00206-3

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title = "Diffuse-interface modeling of composition evolution in the presence of structural defects",

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.",

author = "Hu, {S. Y.} and Chen, {L. Q.}",

note = "Funding Information: The authors are grateful for the financial support from the NSF under the grant no. DMR-96-33719. The simulations were performed at the San Diego Supercomputer Center and the Pittsburgh Supercomputing Center.",

year = "2002",

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doi = "10.1016/S0927-0256(01)00206-3",

language = "English (US)",

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T1 - Diffuse-interface modeling of composition evolution in the presence of structural defects

AU - Hu, S. Y.

AU - Chen, L. Q.

N1 - Funding Information: The authors are grateful for the financial support from the NSF under the grant no. DMR-96-33719. The simulations were performed at the San Diego Supercomputer Center and the Pittsburgh Supercomputing Center.

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Y1 - 2002/4

N2 - 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.

AB - 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.

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EP - 282

JO - Computational Materials Science

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ER -

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

Abstract

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