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Burgers vector

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Published: 01 January 2015
Fig. 3.28 (a) Crystal structure and Burgers vectors in the TiAl (γ) phase. (b) Modified Thompson tetrahedron for the L1 structure More
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Published: 01 June 2008
Fig. 2.7 Burgers circuit and vector for line dislocation. Source: Ref 1 More
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Published: 01 March 2012
Fig. A.35 Burgers circuit and vector for line dislocation. Source: Ref A.5 as published in Ref A.1 More
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Published: 01 August 2005
Fig. A1.2 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. Source: Ref A1.1 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.t56020001
EISBN: 978-1-62708-389-8
... planes, and dislocation passage through precipitates. It also points out important structure-property correlations. antisite defects Burgers vector edge dislocations Frenkel defects grain size impurities mechanical properties pinning Schottky defects screw dislocations solid solution...
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Published: 01 October 2021
Fig. 3 (a) Atom arrangements in an edge dislocation. (b) Illustration of Burgers vector derived from the RH/SF (right-hand/start-to-finish) convention. More
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Published: 01 November 2012
Fig. 5 Creep data for several face-centered cubic metals plotted as a function of normalized shear stress (σ s / G ) compared with a power law stress exponent of n = 4. b, Burgers vector. Source: Ref 5 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.9781627083898
EISBN: 978-1-62708-389-8
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.t56020013
EISBN: 978-1-62708-389-8
... ) = 2 πx e − π x 2 The function is shown in the graph as: Problem 25: Edge Dislocation Gliding in an <italic>fcc</italic> Lattice Consider an edge dislocation with Burgers vector 1 2 [ 110 ] gliding in an fcc lattice. What are the possible glide planes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240017
EISBN: 978-1-62708-251-8
... description of dislocations is given by the Burgers vector, b , illustrated in Fig. 2.7 . This vector is defined using what is called the Burgers circuit, which is an atom-to-atom path that makes a closed loop in a dislocation-free part of the crystal lattice. Now, if the same Burgers circuit is made...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230151
EISBN: 978-1-62708-298-3
... that pyramidal (or c/a) slip does not occur at ambient temperatures. Dislocations that have Burgers vectors with c-axis components are not energetically favored and therefore are not found in samples that have been deformed at low temperatures. These elastic compliances give an elastic modulus of over 300 GPa...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540357
EISBN: 978-1-62708-309-6
... (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. Source: Ref A1.1 Slip from shear stress is the most common deformation mechanism within crystalline lattices of metallic materials, although...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420363
EISBN: 978-1-62708-310-2
.... The method for finding the direction of the a 1 axis is shown in Fig. A.25 . This axis has the same direction as the vector sum of the three vectors, one of them of length +2 along the a 1 axis, another of length –1 along the a 2 axis, and the third of length –1 along the a 3 axis. This yields...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410017
EISBN: 978-1-62708-265-5
... of an incomplete atom plane in a crystal, and the magnitude and direction of the resulting discontinuity is designated as the Burgers vector. As the dislocation moves across a slip plane, from (a) to (d), the top part of the crystal is displaced relative to the bottom part of the crystal. Only the atomic bonds...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410213
EISBN: 978-1-62708-265-5
... in the strain-hardening process, τ 0 is the friction stress to move a dislocation through a crystal without obstacles, G is the shear modulus, b is the dislocation Burgers vector, l is the average effective dislocation line free length at some moment during strain hardening, and ρ is the dislocation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2022
DOI: 10.31399/asm.tb.mbheaktmse.t56030021
EISBN: 978-1-62708-418-5
... dislocation’s Burgers vector, the SFE ( γ ) can be determined by fitting the experimental data using Eq A.1 ( Ref 46 ): (Eq A.1) d = G b p 2 8 πγ · 2 − v 1 − v · ( 1 − 2 v cos 2 θ 2 − v ) where G is the shear modulus, b p is the 1/6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2022
DOI: 10.31399/asm.tb.mbheaktmse.9781627084185
EISBN: 978-1-62708-418-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480051
EISBN: 978-1-62708-318-8
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240117
EISBN: 978-1-62708-251-8
... occurs, and, in the process, the annihilation of dislocations of opposite signs (of the Burger’s vector) takes place. The rearrangement of dislocations is assisted by thermal energy, which aids in both climb and slip mechanisms. Since impurities and alloying elements are attracted to both vacancies...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870375
EISBN: 978-1-62708-344-7
... and bond with atom B . The result is the extra atomic plane appears to have moved one atomic spacing (a Burgers vector) to the left. Breaking and remaking only one weakened atomic bond accomplished this apparent movement. Continued application of the shear stress causes a series of similar weakened atomic...