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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.t56020013
EISBN: 978-1-62708-389-8
... of twinning planes on stacking sequences. The chapter also includes problems on how the formation of precipitates can produce slip planes and how grain boundaries can act as obstacles to dislocation motion. dislocation mobility edge dislocations glide plane grain boundaries miscibility pinning...
Image
Published: 01 March 2006
Fig. 10.19 Edge dislocations of opposite sign (shown by ┴ shaped symbol) moving along glide planes to condense and increase size of nucleus ( N ). Source: Ref 10.6 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
Image
Published: 01 August 2005
Fig. A1.15 Pencil glide. Slip takes place along different planes in one direction, giving the appearance of a pencil-like surface. Source: Ref A1.4 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700135
EISBN: 978-1-62708-279-2
... planes. A stacking fault causes a change in the energy field around it, called stacking fault energy (SFE), in units of mJ/m –2 . Stacking fault energy changes with alloy composition and deformation temperature and its magnitude controls the ease of dislocation glide and the activation of deformation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 31 October 2024
DOI: 10.31399/asm.tb.ahsssta2.t59410147
EISBN: 978-1-62708-482-6
... that are, structurally, mirror images of each other. Twins can be produced by deformation in body-centered cubic and hexagonal close-packed metals, called mechanical twins, and by annealing following deformation in face-centered cubic metals, called annealing twins. Figure 9.1(a) shows the twin plane...
Image
Published: 01 July 2000
surfaces. (B) A high stress acts across the plane of tunnel formation. Fracture of the tunnel walls occurs while they are relatively thick. In addition, glide processes are initiated on the grain under the action of the stress, and selective attack occurs where the emergent slip planes intersect More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 31 October 2024
DOI: 10.31399/asm.tb.ahsssta2.t59410031
EISBN: 978-1-62708-482-6
... of metals and alloys depend largely on the presence of such defects. Deformation by Dislocation Glide Dislocations are simply extra half-planes in metal crystals. They are basic to understanding the mechanical behavior of metals, and it is assumed that the concept of dislocations is clear...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240017
EISBN: 978-1-62708-251-8
... that dislocations on that slip plane slip or glide. If the normal, n , of the slip plane lies at an angle, ϕ, to the tensile axis, its area will be A /cos ϕ. Similarly, if the slip plane lies at an angle, λ, to the tensile axis, the component of the axial force, P , acting on the slip direction will be P cos λ...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700023
EISBN: 978-1-62708-279-2
... and the distorted lattice is resistant to dislocation glide and hence increases its strength and hardness. Transformation to martensite occurs at temperatures below 250 °C, and the percentage of transformation depends only on the temperature to which it is cooled. Transformation to martensite occurs...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420363
EISBN: 978-1-62708-310-2
... Abstract This appendix provides a detailed overview of the crystal structure of metals. It describes primary bonding mechanisms, space lattices and crystal systems, unit cell parameters, slip systems, and crystallographic planes and directions as well as plastic deformation mechanisms...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540357
EISBN: 978-1-62708-309-6
... (orthogonal) {112} planes and 24 unique {123} planes, which each has one possible slip direction. An example is shown in Fig. A1.14(b) (right). Thus, there are a total of 48 possible slip systems ( Table A1.4 ) in a bcc lattice from the glide of dislocations with a Burgers vector of type 1/2 in the (111...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240265
EISBN: 978-1-62708-251-8
.... Having climbed, the dislocation proceeds along the new slip plane until it encounters another resistant obstacle, whereupon it climbs (or descends) to another parallel plane and the process repeats. Since dislocation motion depends on both dislocation glide and climb, the term climb-glide creep is used...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.t56020001
EISBN: 978-1-62708-389-8
..., and how they respond to applied stresses and strains. The chapter makes extensive use of graphics to illustrate crystal lattice structures and related concepts such as vacancies and interstitial sites, ion migration, volume expansion, antisite defects, edge and screw dislocations, slip planes, twinning...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700095
EISBN: 978-1-62708-279-2
...: Adapted from Ref 5.5 Deformation Mechanism of Dual-Phase Steels Dual-phase steels deform solely by dislocation glide, which occurs mainly in the soft ferrite matrix. The hard martensite islands obstruct dislocation glide and cause an increase in the stress level. The soft ferrite phase...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 31 October 2024
DOI: 10.31399/asm.tb.ahsssta2.t59410105
EISBN: 978-1-62708-482-6
... steel. F, ferrite; B, bainite; P, pearlite; M, martensite. Adapted from Ref 5.6 5.3 Deformation Mechanism of Dual-Phase Steels Dual-phase steels deform solely by dislocation glide that occurs mainly in the soft ferrite matrix. The hard martensite islands obstruct dislocation glide and cause...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... or intergranular fracture) or from geometric conditions (notches, cracks, section size) that constrain deformation and thereby induce plane-strain crack growth under tension. These various mechanisms are described in section 2.4 . Fracture by glide is a ductile-type fracture from deformation along a shear...
Book Chapter

By D. T. Read
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860237
EISBN: 978-1-62708-348-5
... in any plastic region is called the strain-hardening coefficient. The reason for the low strain-hardening coefficient in stage I, according to Dieter (1961) , is that the moving dislocations traverse the slip plane to the crystal surface and escape. During easy glide, slip always occurs on only one slip...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700071
EISBN: 978-1-62708-279-2
... in metals is related to dislocation glide through crystal lattices. In pure metals strength is determined by an intrinsic lattice resistance to dislocation glide. Lattice imperfections, such as dislocations, twins, solid solutions, impurities, precipitates, and grain boundaries provide obstacles...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 31 October 2024
DOI: 10.31399/asm.tb.ahsssta2.t59410081
EISBN: 978-1-62708-482-6
...-strain curve. Strength in metals is related to dislocation glide through crystal lattices. In pure metals, strength is determined by an intrinsic lattice resistance to dislocation glide. Lattice imperfections, such as dislocations, twins, solid solutions, impurities, precipitates, and grain...