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Grain-Boundary Sliding in Metals
Metallurgical Reviews, 1966AbstractGrain-boundary sliding is the relative translation of a pair of grains by a shear movement at their common interface. This definition is meant to include cases where shear takes place in a zone of finite width around the boundary, and cases in which sliding is a shear confined completely to the interface, if indeed this latter ever actually ...
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Materials Science and Engineering: A, 2009
Abstract A dislocation–density grain boundary (GB) interaction scheme, a GB misorientation dependent dislocation–density relation, and a grain boundary sliding (GBS) model are presented to account for the behavior of nanocrystalline aggregates with grain sizes ranging from 25 nm to 200 nm.
J. Shi, M.A. Zikry
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Abstract A dislocation–density grain boundary (GB) interaction scheme, a GB misorientation dependent dislocation–density relation, and a grain boundary sliding (GBS) model are presented to account for the behavior of nanocrystalline aggregates with grain sizes ranging from 25 nm to 200 nm.
J. Shi, M.A. Zikry
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On grain boundary sliding and diffusional creep
Metallurgical Transactions, 1971The problem of sliding at a nonplanar grain boundary is considered in detail. The stress field, and sliding displacement and velocity can be calculated at a boundary with a shape which is periodic in the sliding direction (a wavy or stepped grain boundary): a) when deformation within the crystals which meet at the boundary is purely elastic, b) when ...
R. Raj, M. F. Ashby
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SSRN Electronic Journal, 2020
The diffusion processes involved in the accommodation of grain boundary sliding in diffusional deformation are revisited by considering the role of grain boundary curvature and of the associated grain boundary migration. A method is developed for calculating grain boundary profiles, diffusional fluxes, and the dissipation power arising from the ...
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The diffusion processes involved in the accommodation of grain boundary sliding in diffusional deformation are revisited by considering the role of grain boundary curvature and of the associated grain boundary migration. A method is developed for calculating grain boundary profiles, diffusional fluxes, and the dissipation power arising from the ...
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On the migration of grain boundaries during sliding
Scripta Metallurgica, 1989Analyse par une technique de piqures d'attaque et par etude microstructurale de la migration des joints de glissement dans les bicristaux Cu-9% at.
S. Hashimoto, B. Baudelet
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The activation areas for grain boundary sliding
Journal of Materials Science, 1970The activation areas for grain boundary sliding in Al, Pb, Sn, Zn, and Cu are compared with those for creep in the same materials. It is found that the activation area-stress relation for grain boundary sliding is similar to that for creep. This observation is consistent with a dislocation or ledge mechanism of grain boundary sliding.
N. Balasubramanian, J. C. M. Li
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On the contribution of extrinsic grain boundary dislocations to grain boundary sliding in bicrystals
Acta Materialia, 1997Abstract The possibility of separating the contributions of extrinsic grain boundary dislocations of different origins to the overall grain boundary shear is shown using the model of grain boundary sliding operating under the conditions of plastic incompatibility.
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Mechanism for “Viscous” Grain-boundary Sliding
Nature, 1966THERE is increasing interest in mechanisms which give plastic deformation at low stresses and moderately high or high temperatures (more than half the melting temperature Tm). Theories of diffusional creep, using either the Nabarro–Herring (NH) mechanism1 based on lattice self-diffusion or Coble's2 variation involving grain-boundary self-diffusion, do ...
R. C. GIFKINS, K. U. SNOWDEN
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The measurement of grain boundary sliding in polycrystals
Metallurgical transactions, 1974Measurements on the creep strain attributable to grain boundary sliding, ∈gb, have frequently been performed on the specimen surface. However, thus far there has been no investigation using correct techniques to show that such surface measurements are also representative of the specimen interior.
R. S. Gates, R. N. Stevens
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Damage, Opening and Sliding of Grain Boundaries
2004This paper presents an approach to the modeling of damage, opening and sliding of the grain boundaries in zircaloy submitted to stress corrosion cracking. Grain boundaries are seen as a continuous material. The grains are modeled by a model of crystal viscoplasticity.
A. Musienko, G. Cailletaud, O. Diard
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