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edge dislocations

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Published: 01 January 2005
Fig. 10 (a) Geometry of a row of edge dislocations, causing a misorientation between the two sections of the crystal. (b) Polished and etched surface of a germanium crystal revealing a subboundary by the row of etch pits associated with the dislocation cores. Reprinted from Ref 7 . Source: Ref More
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Published: 01 December 2004
Fig. 4 Schematic representation of a section through an edge dislocation, which is perpendicular to the plane of the illustration and is indicated by the symbol ⊥ More
Image
Published: 01 December 2004
Fig. 6 Schematic representation of a crystal containing an edge dislocation, indicating qualitatively the stresses (shown by direction of arrows) at four positions around the dislocation More
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Published: 01 January 2000
Fig. 5 Schematic of an edge dislocation More
Image
Published: 01 January 2000
Fig. 20 (a) Schematic representation of an edge dislocation in NaCl. (b) Demonstration of how dislocation jogs in ionic crystals can have effective charges. Source: Ref 12 More
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Published: 01 June 2012
Fig. 5 Schematic illustration of an edge dislocation More
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Published: 01 January 1997
Fig. 11 A schematic of an edge dislocation, represented by a partial atomic plane, in a crystal. The “core” of the dislocation is localized at the partial plane termination. Atomic positions are distorted in region of this core, making slip easier in the vicinity of the dislocation. Source: Ref More
Image
Published: 01 December 2004
Fig. 9 Schematic representation of dislocation-generated antiphase boundaries (APBs). The lower APB is generated by one edge dislocation, while the upper APB is terminated between a pair of edge dislocations, creating a superlattice dislocation. Source: Ref 9 More
Image
Published: 01 December 2004
Fig. 1 Fe-3Si single crystal, cold rolled 5% in the (111)[11 2 ¯ ] orientation. Trails of small dislocation loops, edge dislocation dipoles, and cusps on dislocation lines. Thin-foil TEM specimen prepared parallel to the rolling plane. 62,000× More
Image
Published: 01 January 2002
Fig. 3 Dislocation models for cleavage fracture. (a) Elastic crack regarded as a pileup of edge dislocations. (b) Pileup against a boundary forming a crack. (c) Crack forming by movement of dislocations on two slip planes. (d) Crack formation at tilt boundary. Source: Ref 4 More
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Published: 01 January 2005
Fig. 3 Fe-3Si single crystal, cold rolled 5% in the (111)[11 2 ] orientation. Trails of small dislocation loops, edge dislocation dipoles, and cusps on dislocation lines. Thin-foil TEM specimen prepared parallel to the rolling plane. Original magnification 62,000× More
Image
Published: 01 December 2004
Fig. 7 Small-angle boundary (subboundary) of the tilt type, which consists of a vertical array of edge dislocations More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003733
EISBN: 978-1-62708-177-1
... the atomic sequence to be out of step and thus generate an APB (lower section of Fig. 9 ). The amount of dislocation-generated APBs can be minimized if dislocation pairs (for example, two edge dislocations) align such that the dislocation-generated APB is terminated at the other edge dislocation (upper...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003084
EISBN: 978-1-62708-199-3
..., trivacancies, and interstitial-vacancy pairs. Line Defects Dislocations are line defects that exist in all real crystals. An edge dislocation, which is the edge of an incomplete plane of atoms within a crystal, is represented in cross section in Fig. 9 . In this illustration, the incomplete plane...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002354
EISBN: 978-1-62708-193-1
... amplitudes (high values of N f ), arrangements of edge dislocation dipoles are found that form mainly due to single slip. Dislocations agglomerate to so-called bundles or veins, which are separated from each other by regions of low dislocation density (channels). Embedded in this matrix, persistent slip...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006644
EISBN: 978-1-62708-213-6
... successfully used in back-reflection x-ray topography to clarify the screw character of the micropipes in SiC ( Ref 13 ). It also has been used to reveal the dislocation sense of screw dislocations ( Ref 14 ), the Burgers vectors of threading-edge dislocations ( Ref 15 ), the core structure of Shockley partial...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005455
EISBN: 978-1-62708-196-2
... in the overall amount of strain (e.g., when a large substitutional solute occupies a lattice site below the extra half-plane of atoms in an edge dislocation, i.e., where the strains are tensile in nature), the line energy of the dislocation will be reduced, as will the degree of misfit about the solute. Likewise...
Image
Published: 01 January 2005
Fig. 2 Deformation in a crystal lattice from slip of line defect (dislocation) from a position in (a) to the edge in (c). The vector b is the Burgers vector, which is defined as the unit displacement of a dislocation. More
Book Chapter

Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006292
EISBN: 978-1-62708-163-4
... of this article. Crystal Structure Crystal structure is the arrangement of atoms in the interior of a crystal. A fundamental unit of the arrangement repeats itself at regular intervals in three dimensions throughout the interior of the crystal. Unit Cell A unit cell is a parallelepiped whose edges...
Book Chapter

Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003722
EISBN: 978-1-62708-177-1
... of a crystal. A fundamental unit of the arrangement repeats itself at regular intervals in three dimensions throughout the interior of the crystal. Unit Cell A unit cell is a parallelepiped whose edges form the axes of a crystal. A unit cell is the smallest pattern of atomic arrangement. A crystal...