Effect of applied load on nucleation and growth of γ-hydrides in zirconium

X. Q. Ma; S. Q. Shi; C. H. Woo; L. Q. Chen

doi:10.1016/S0927-0256(01)00226-9

Effect of applied load on nucleation and growth of γ-hydrides in zirconium

X. Q. Ma, S. Q. Shi, C. H. Woo, L. Q. Chen

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42 Scopus citations

Abstract

γ-hydride precipitation and growth in zirconium were investigated by using a phase-field kinetic model. The orientation difference of hydride is represented by non-conservative structural field variables, whereas the concentration difference of hydrogen in precipitates and matrix is described by a conserved field variable. The temporal evolution of the spatially dependent field variables is determined by numerically solving the time-dependent Ginzburg-Landau equations for the structural variables and the Cahn-Hilliard diffusion equation for the concentration variable. It is demonstrated that a certain load level is required to completely re-orient hydride precipitates and it is most effective to apply loads during the initial nucleation stage for producing anisotropic precipitate alignment.

Original language	English (US)
Pages (from-to)	283-290
Number of pages	8
Journal	Computational Materials Science
Volume	23
Issue number	1-4
DOIs	https://doi.org/10.1016/S0927-0256(01)00226-9
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)00226-9

Cite this

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title = "Effect of applied load on nucleation and growth of γ-hydrides in zirconium",

abstract = "γ-hydride precipitation and growth in zirconium were investigated by using a phase-field kinetic model. The orientation difference of hydride is represented by non-conservative structural field variables, whereas the concentration difference of hydrogen in precipitates and matrix is described by a conserved field variable. The temporal evolution of the spatially dependent field variables is determined by numerically solving the time-dependent Ginzburg-Landau equations for the structural variables and the Cahn-Hilliard diffusion equation for the concentration variable. It is demonstrated that a certain load level is required to completely re-orient hydride precipitates and it is most effective to apply loads during the initial nucleation stage for producing anisotropic precipitate alignment.",

author = "Ma, {X. Q.} and Shi, {S. Q.} and Woo, {C. H.} and Chen, {L. Q.}",

note = "Funding Information: This work was supported by grants from the Research Grants Council of Hong Kong (B-Q411) for Shi, Woo and Chen, and from Hong Kong Polytechnic University (G-V851) for Ma, and from the U.S. National Science Foundation (DMR 96-33719) for Chen.",

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doi = "10.1016/S0927-0256(01)00226-9",

language = "English (US)",

volume = "23",

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journal = "Computational Materials Science",

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T1 - Effect of applied load on nucleation and growth of γ-hydrides in zirconium

AU - Ma, X. Q.

AU - Shi, S. Q.

AU - Woo, C. H.

AU - Chen, L. Q.

N1 - Funding Information: This work was supported by grants from the Research Grants Council of Hong Kong (B-Q411) for Shi, Woo and Chen, and from Hong Kong Polytechnic University (G-V851) for Ma, and from the U.S. National Science Foundation (DMR 96-33719) for Chen.

PY - 2002/4

Y1 - 2002/4

N2 - γ-hydride precipitation and growth in zirconium were investigated by using a phase-field kinetic model. The orientation difference of hydride is represented by non-conservative structural field variables, whereas the concentration difference of hydrogen in precipitates and matrix is described by a conserved field variable. The temporal evolution of the spatially dependent field variables is determined by numerically solving the time-dependent Ginzburg-Landau equations for the structural variables and the Cahn-Hilliard diffusion equation for the concentration variable. It is demonstrated that a certain load level is required to completely re-orient hydride precipitates and it is most effective to apply loads during the initial nucleation stage for producing anisotropic precipitate alignment.

AB - γ-hydride precipitation and growth in zirconium were investigated by using a phase-field kinetic model. The orientation difference of hydride is represented by non-conservative structural field variables, whereas the concentration difference of hydrogen in precipitates and matrix is described by a conserved field variable. The temporal evolution of the spatially dependent field variables is determined by numerically solving the time-dependent Ginzburg-Landau equations for the structural variables and the Cahn-Hilliard diffusion equation for the concentration variable. It is demonstrated that a certain load level is required to completely re-orient hydride precipitates and it is most effective to apply loads during the initial nucleation stage for producing anisotropic precipitate alignment.

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JO - Computational Materials Science

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ER -

Effect of applied load on nucleation and growth of γ-hydrides in zirconium

Abstract

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