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First Principles Simulation of Grain Boundary Sliding
Physical Review Letters, 1996 We present the results of a total-energy pseudopotential simulation of the sliding process at a $\ensuremath{\Sigma}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}5$ (001) twist grain boundary in germanium. Sliding involves a stick-slip mechanism with local rebonding among a few atoms, accompanied by the clearance of gap states.
Molteni, C +3 more
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Effect of grain boundary structures on grain boundary sliding in magnesium
Materials Letters, 2012Abstract The effect of grain boundary structures on the deformation behavior at the grain boundaries in magnesium was examined by the nanoindentation creep test. The results of the nanoindentation creep test showed that the dominant deformation mechanism around the grain boundary was grain boundary sliding; however, the occurrence of grain boundary ...
Hidetoshi Somekawa, Toshiji Mukai
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Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 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.
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.
M A Zikry
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Tracking the sliding of grain boundaries at the atomic scale
Science, 2022Grain boundaries (GBs) play an important role in the mechanical behavior of polycrystalline materials. Despite decades of investigation, the atomic-scale dynamic processes of GB deformation remain elusive, particularly for the GBs in polycrystals, which are commonly of the asymmetric and general type.
Lihua Wang +19 more
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Grain Boundary Sliding at Serrated Grain Boundaries
Advanced Performance Materials, 1997A constitutive model is developed for grain boundary sliding (GBS) at serrated grain boundaries. Based on a previously developed GBS model, using the dynamics of grain boundary dislocation pile-up, the present model takes the average of the sliding rate over the characteristic dimensions of grain boundary serrations.
X.J. Wu, Ashok K. Koul
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Dislocations in grain boundaries and grain boundary sliding
Acta Metallurgica, 1967Abstract The Burgers vectors of grain boundary dislocations were analyzed by transmission electron microscopy in creep tested iron and iron alloys. The analysis indicates that the dislocations retain their original Burgers vectors when joining grain boundaries and remain undissociated. It is suggested that grain boundary sliding in creep is caused by
Y Ishida, M.Henderson Brown
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Nature, 1962
WHEN bicrystals are subjected to a constant shear stress parallel to the boundary plane, the grain boundary sliding velocity decreases with time1–4. We wish to report some experiments which demonstrate the important part played by crystal slip in determining this characteristic of boundary sliding.
R. L. BELL, N. B. W. THOMPSON
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WHEN bicrystals are subjected to a constant shear stress parallel to the boundary plane, the grain boundary sliding velocity decreases with time1–4. We wish to report some experiments which demonstrate the important part played by crystal slip in determining this characteristic of boundary sliding.
R. L. BELL, N. B. W. THOMPSON
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Anelasticity and grain boundary sliding
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2010We describe a theoretical and numerical analysis of an existing model of anelasticity owing to grain boundary sliding. Two linearly elastic layers having finite thickness and identical material constants are separated by a given fixed spatially periodic interface across which the normal component
Lee, L. C., Morris, S. J. S.
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On the grain boundary conditions for grain boundary sliding in superplastic deformation
Materials Science and Engineering, 1986Abstract Grain boundary sliding (GBS) is analysed in terms of the rate of formation and the rate of spreading of extrinsic grain boundary dislocations (EGBDs). It is calculated employing a mathematical model derived in such a way that in superplastic alloys, where GBS is a primary deformation mode, the rate of EGBD spreading is at least equal to or ...
R.A. Varin, K.J. Kurzydlowski, K. Tangri
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