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dislocations

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Published: 01 January 1986
Fig. 13 Lang topograph of a silicon crystal showing dislocations, including a Frank-Read source and thickness fringes. Source: Ref 20 More
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Published: 01 June 2016
Fig. 2 Dislocations, which have “knitted” themselves into small-angle subboundaries, in a specimen of unalloyed nickel that was cold rolled to a reduction of 8% and then annealed for 2 h at 600 °C (1110 °F). Thin-foil transmission electron microscopy specimen. Original magnification: 10,000× More
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Published: 01 January 1986
Fig. 23 Bright-field image of polycrystalline aluminum showing dislocations as they often appear in metallic crystals. The dislocations appear as dark curved lines and exhibit dark contrast relative to the matrix due to the distortion of the atomic planes near the dislocations More
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Published: 01 January 1986
Fig. 58 Elastic displacement field associated with dislocations. (a) An edge dislocation at which the perfect part of the crystal is oriented far from the Bragg angle. (b) The transmitted intensity, I t , as a function of depth, z , below the entrance surface of the thin crystal More
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Published: 01 January 1996
Fig. 10 Schematic representation of a cross slip process of several dislocations at an obstable (X), if (a) planar slip or (b) wavy slip prevails. Source: Ref 24 More
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Published: 01 December 2004
Fig. 14 Bright-field image of martensite dislocations obtained using the (001) b reflection. Source: Ref 11 . Reprinted with permission More
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Published: 01 December 2004
Fig. 5 Dislocations, which have “knitted” themselves into small-angle subboundaries, in a specimen of unalloyed nickel that was cold rolled to a reduction of 8% and then annealed for 2 h at 600 °C (1110 °F). Thin-foil TEM specimen. 10,000× More
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Published: 01 December 2004
Fig. 3 Individual dislocations (revealed by careful etching) that comprise a subboundary in germanium. HNO 3 -acetic-HF-bromine. 1500×. Courtesy of W.G. Pfann More
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Published: 01 December 2004
Fig. 4 Dislocations and subboundaries produced by polygonization in germanium annealed after deformation. HNO 3 -acetic-HF-bromine. 250×. Courtesy of J.R. Patel More
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Published: 01 December 2004
Fig. 5 Dislocations aligned on traces of slip planes in germanium deformed at low temperature. HNO 3 -acetic-HF-bromine. 200×. Courtesy of J.R. Patel More
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Published: 01 December 2004
Fig. 11 Dislocations in a small-angle tilt boundary in gold. Thin-foil transmission electron micrograph. See also Fig. 10 24,000×. Courtesy of R.W. Balluffi More
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Published: 01 December 2004
Fig. 12 Dislocations in a small-angle twist boundary in gold. Thin-foil transmission electron micrograph. See also Fig. 10 Courtesy of R.W. Balluffi More
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Published: 31 December 2017
Fig. 12 (a) Ashby and (b) Orowan models for interaction of dislocations with coherent and incoherent precipitates More
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Published: 01 December 1998
Fig. 10 Effect of dislocations introduced by cold working and removed by annealing on width of diffraction peaks in brass. Source: Ref 1 More
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Published: 01 December 1998
Fig. 18 Transmission electron microscopy imaging of dislocations in aluminum. Source: Ref 3 More
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Published: 01 January 2006
Fig. 22 (a) X dislocation sources per unit volume emit dislocations over a radius L . Continued emission (and hence strain) requires that the outermost dislocations in each loop be annihilated by climb processes between nearby loops separated by the distance h . (b) A two-dimensional view More
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Published: 01 December 2009
Fig. 10 High-resolution electron microscopy image of misfit dislocations that accommodate the difference of the lattice constants of the two phases MgO and MgIn 2 O 4 . In (a), the Burgers vectors of the misfit dislocations are parallel to the interface. The MgO layer grows slowly More
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Published: 01 December 2009
Fig. 11 Critical condition for barrier-less nucleation of slip dislocations in stress field of plate periphery. Source: Ref 56 More
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Published: 01 December 2009
Fig. 13 Flow chart schematically illustrating the behavior of dislocations produced by strain hardening during continuous dynamic recrystallization (hatched arrows), the continuous increase of low-angle boundary (LAB) misorientations (gray arrows), and the absorption of dislocations More
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Published: 01 December 2009
Fig. 10 Dislocations (shown as the boundaries between slipped and unslipped regions) in the γ/γ′ microstructure of −0.3% lattice misfit under 152 MPa [001] tensile stress. Cross-sectional view on the slip plane for (b) 1 / 2 [ 101 ] ( 1 ¯ 1 ¯ 1 ) dislocations More