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Geometrically necessary dislocations in FCC polycrystalline metallic materials on the mesoscale
Bulletin of the Russian Academy of Sciences: Physics, 2011The dislocation structure of deformed copper alloys doped with Mn and Al was determined by selected area diffraction (SAD), performed using a transmission electron microscope. The scalar dislocation density, the density of geometrically necessary dislocations, and the density of statistically stored dislocations were measured.
E. V. Kozlov +3 more
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Experimentally determined content of a geometrically necessary dislocation boundary in copper
Acta Materialia, 2004Abstract Weak beam and stereo transmission electron microscopy (TEM) were used to analyze the dislocation content of a crystallographic geometrically necessary dislocation boundary (GNB) in rolled copper. The GNB is oriented close to the ( 1 1 1) slip plane and is composed primarily of dislocations from the three highest stressed slip ...
Rodney J McCabe +2 more
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Assessment of geometrically necessary dislocation levels derived by 3D EBSD
Acta Materialia, 2015Abstract Existing alternatives for the calculation of geometrically necessary dislocation (GND) densities from orientation fields are discussed. Importantly, we highlight the role of reference frames and consider different sources of error. A well-controlled micro cantilever bending experiment on a copper bicrystal has been analyzed by 3-dimensional ...
P.J. Konijnenberg +2 more
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Estimations of bulk geometrically necessary dislocation density using high resolution EBSD
Ultramicroscopy, 2013Characterizing the content of geometrically necessary dislocations (GNDs) in crystalline materials is crucial to understanding plasticity. Electron backscatter diffraction (EBSD) effectively recovers local crystal orientation, which is used to estimate the lattice distortion, components of the Nye dislocation density tensor (α), and subsequently the ...
T J, Ruggles, D T, Fullwood
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Geometrically necessary dislocation fingerprints of dislocation loop absorption at grain boundaries
Physical Review Materials, 2022Larissa M. Woryk +7 more
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Identification of geometrically necessary dislocations in solid phase crystallized poly-Si
Journal of Applied Physics, 2013In this work, the presence of geometrically necessary dislocations (GNDs) in polycrystalline silicon (poly-Si) thin films was detected, suggesting that plastic deformation occurs during the solid phase crystallization (SPC) process of amorphous silicon (a-Si:H).
Law, F. +5 more
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Materials Science and Engineering: A, 2001
Abstract In deformed crystals, long-range internal stresses develop during deformation as a consequence of the heterogeneity of the distribution of the dislocations which frequently form a cell structure. The composite model describes these internal stresses in a natural manner in terms of the elastic/plastic strain mismatch between the hard cell ...
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Abstract In deformed crystals, long-range internal stresses develop during deformation as a consequence of the heterogeneity of the distribution of the dislocations which frequently form a cell structure. The composite model describes these internal stresses in a natural manner in terms of the elastic/plastic strain mismatch between the hard cell ...
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Scripta Materialia, 2008
From local orientation measurements on planar surfaces by means of electron backscattering diffraction, six components of the lattice curvature tensor can be identified. They allow determination of five components of the dislocation density tensor (thus two more than hitherto reported) and, additionally, one difference between two other components ...
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From local orientation measurements on planar surfaces by means of electron backscattering diffraction, six components of the lattice curvature tensor can be identified. They allow determination of five components of the dislocation density tensor (thus two more than hitherto reported) and, additionally, one difference between two other components ...
openaire +1 more source