Effects of grain boundary sliding on creep-constrained boundary cavitation and creep deformation

K. J. Hsia; D. M. Parks; A. S. Argon

doi:10.1016/0167-6636(91)90038-2

Effects of grain boundary sliding on creep-constrained boundary cavitation and creep deformation

K. J. Hsia, D. M. Parks, A. S. Argon

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

Abstract

Creep of polycrystalline materials was modeled using a periodic array of plane strain hexagonal grains. Effects of grain boundary sliding on such an array containing a distribution of boundary facet cracks were investigated using the finite element method. The facet crack opening rate in a creeping material with grain boundary sliding and the energy release rate due to the development of a facet crack were studied parametrically in terms of the creep exponent n, equivalent stress triaxiality S/σ_e and crack density p. The results were generalized to the 3-D case of penny-shaped cracks. As an application, the grain boundary cavity growth rate under a creep-constrained condition and the creep constitutive equation, all with grain boundary sliding, were obtained and compared with the non-sliding boundary case. The results show that both cavity growth rate and creep strain rate are substantially increased, and become more sensitive to stress triaxiality if grain boundary sliding is considered.

Original language	English (US)
Pages (from-to)	43-62
Number of pages	20
Journal	Mechanics of Materials
Volume	11
Issue number	1
DOIs	https://doi.org/10.1016/0167-6636(91)90038-2
State	Published - Mar 1991
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Instrumentation
Mechanics of Materials

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10.1016/0167-6636(91)90038-2

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title = "Effects of grain boundary sliding on creep-constrained boundary cavitation and creep deformation",

abstract = "Creep of polycrystalline materials was modeled using a periodic array of plane strain hexagonal grains. Effects of grain boundary sliding on such an array containing a distribution of boundary facet cracks were investigated using the finite element method. The facet crack opening rate in a creeping material with grain boundary sliding and the energy release rate due to the development of a facet crack were studied parametrically in terms of the creep exponent n, equivalent stress triaxiality S/σe and crack density p. The results were generalized to the 3-D case of penny-shaped cracks. As an application, the grain boundary cavity growth rate under a creep-constrained condition and the creep constitutive equation, all with grain boundary sliding, were obtained and compared with the non-sliding boundary case. The results show that both cavity growth rate and creep strain rate are substantially increased, and become more sensitive to stress triaxiality if grain boundary sliding is considered.",

author = "Hsia, {K. J.} and Parks, {D. M.} and Argon, {A. S.}",

note = "Funding Information: This research has been supported by the NSF/MRL through the M.I.T. Center for Materials Science and Engineering under Grant No. DMR-87-19217. The FEM computations have benefited markedly from the availability of an A1-liant FX-8 computer made possible through a DARPA/ONR URI program on simulation of polymer properties under Contract No. N00014-86-K-0768. The ABAQUS finite element program was made available under academic license from Hibbitt, Karlsson, and Sorensen, Inc., Providence, RI. The authors also acknowledge some useful discussions with Professor G. Rodin of the University of Texas at Austin. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1991",

month = mar,

doi = "10.1016/0167-6636(91)90038-2",

language = "English (US)",

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T1 - Effects of grain boundary sliding on creep-constrained boundary cavitation and creep deformation

AU - Hsia, K. J.

AU - Parks, D. M.

AU - Argon, A. S.

N1 - Funding Information: This research has been supported by the NSF/MRL through the M.I.T. Center for Materials Science and Engineering under Grant No. DMR-87-19217. The FEM computations have benefited markedly from the availability of an A1-liant FX-8 computer made possible through a DARPA/ONR URI program on simulation of polymer properties under Contract No. N00014-86-K-0768. The ABAQUS finite element program was made available under academic license from Hibbitt, Karlsson, and Sorensen, Inc., Providence, RI. The authors also acknowledge some useful discussions with Professor G. Rodin of the University of Texas at Austin. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1991/3

Y1 - 1991/3

N2 - Creep of polycrystalline materials was modeled using a periodic array of plane strain hexagonal grains. Effects of grain boundary sliding on such an array containing a distribution of boundary facet cracks were investigated using the finite element method. The facet crack opening rate in a creeping material with grain boundary sliding and the energy release rate due to the development of a facet crack were studied parametrically in terms of the creep exponent n, equivalent stress triaxiality S/σe and crack density p. The results were generalized to the 3-D case of penny-shaped cracks. As an application, the grain boundary cavity growth rate under a creep-constrained condition and the creep constitutive equation, all with grain boundary sliding, were obtained and compared with the non-sliding boundary case. The results show that both cavity growth rate and creep strain rate are substantially increased, and become more sensitive to stress triaxiality if grain boundary sliding is considered.

AB - Creep of polycrystalline materials was modeled using a periodic array of plane strain hexagonal grains. Effects of grain boundary sliding on such an array containing a distribution of boundary facet cracks were investigated using the finite element method. The facet crack opening rate in a creeping material with grain boundary sliding and the energy release rate due to the development of a facet crack were studied parametrically in terms of the creep exponent n, equivalent stress triaxiality S/σe and crack density p. The results were generalized to the 3-D case of penny-shaped cracks. As an application, the grain boundary cavity growth rate under a creep-constrained condition and the creep constitutive equation, all with grain boundary sliding, were obtained and compared with the non-sliding boundary case. The results show that both cavity growth rate and creep strain rate are substantially increased, and become more sensitive to stress triaxiality if grain boundary sliding is considered.

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Effects of grain boundary sliding on creep-constrained boundary cavitation and creep deformation

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