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dislocations

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Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003742
EISBN: 978-1-62708-177-1
..., dislocation boundaries, and macroscopic properties. It discusses three different microstructural types: cell blocks, TL blocks, and equiaxed subgrains. The article also emphasizes the behavior of metals and single-phase alloys processed under plastic deformation (dislocation slip) conditions. It provides...
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
... Fig. 34 Cyclic deformation curve of α-brass at Δε pl = 5 × 10 −3 as a function of the degree of monotonic (tensile) predeformation. Source: Ref 209 Fig. 10 Schematic representation of a cross slip process of several dislocations at an obstable (X), if (a) planar slip or (b) wavy slip...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004020
EISBN: 978-1-62708-185-6
..., followed by the models of constitutive behavior. It provides a discussion on creep mechanisms involving dislocation and diffusional flow, such as the Nabarro-Herring creep and the Coble creep. The equations for the several creep rates are also presented. Research on the mechanism of the superplastic flow...
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
... to structural materials, namely, solid-solution strengthening, age/precipitation hardening, dispersion strengthening, grain size reduction, strengthening from cold work, and strengthening from interfaces. It explains the application of predictive models in the atomistic modeling of dislocation structures...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005432
EISBN: 978-1-62708-196-2
..., distributing nuclei of recrystallized grains, growing the recrystallized grains, and updating the dislocation density. The article concludes with information on the developments in CA simulations. cellular automaton model static recrystallization dynamic recrystallization microstructure dislocation...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005433
EISBN: 978-1-62708-196-2
... and classical physical constitutive equations. The article also reviews the accommodation mechanisms that are divided into two major groups, namely, diffusional accommodation and accommodation by dislocations. constitutive model superplastic flow superplasticity phenomenological constitutive equation...
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
..., their dislocations and degrees of ordering (long and short order). It focuses on the common superlattice structures and ordered phases observed in copper-gold and iron-aluminum alloy systems. These superlattice types can be referred to by Strukturbericht symbols and the prototype phase. antiphase boundaries...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002355
EISBN: 978-1-62708-193-1
.... Push-pull symmetrical loading ( R = −1) with low stress amplitudes. Number of cycles to fracture, N f = 1.2 × 10 6 cycles Fig. 5 Summary of near-surface dislocation structures as a function of amplitude (expressed here through number of cyles to fracture, N f ) and stacking-fault...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006307
EISBN: 978-1-62708-179-5
... without going into dislocation theory. The article discusses modeling of hardness in cast iron based on a regular solution equation in which the properties of each phase depend on chemical composition and coarseness. It describes the evaluation of material parameters from the tensile stress-strain curve...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005183
EISBN: 978-1-62708-186-3
... creep mechanisms that are useful for illustrating the strong stress dependence of dislocation and diffusional flow. ambient temperature Isothermal constitutive modeling physical models strain hardening strain-rate-sensitive flow superplastic flow CONSTITUTIVE RELATIONS for metalworking...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003784
EISBN: 978-1-62708-177-1
... Abstract Pure metals normally solidify into polycrystalline masses, but it is relatively easy to produce single crystals by directional solidification from the melt. This article illustrates the dislocations present in a metal crystal, which is often polygonized into sub-boundaries during grain...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006287
EISBN: 978-1-62708-169-6
..., boron, zirconium, chromium, vanadium, scandium, nickel, tin, and bismuth. The article discusses the secondary phases in aluminum alloys, namely, nonmetallic inclusions, porosity, primary particles, constituent particles, dispersoids, precipitates, grain and dislocation structure, and crystallographic...
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
... dislocation defects stacking faults References 1. V. Berg W. , Uber eine Rontgenographische Methode zur Untersuchung von Gitterstorungen an Kristallen , Naturwissenschaften , Vol 19 , 1931 , p 391 – 396 , 10.1007/BF01522358 2. Barrett C.S. , A New...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001766
EISBN: 978-1-62708-178-8
... be solved, at least in part, with AEM. analytical electron microscopes analytical transmission electron microscopy bright-field microscopy data analysis defect analysis deformation dislocations electron diffraction electron energy loss spectroscopy electron guns grain-boundary segregation...
Book Chapter

By Sammy Tin
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005404
EISBN: 978-1-62708-196-2
.... , Vol 27 , p. 387 , 1979 10. Monkman F.C. and Grant N.J. , Proc. Ameri. Soc. Test. Mater. , Vol 56 , p. 593 , 1956 11. Hirth J.P. and Lothe J. , “Theory of Dislocations” 12. Weertman J. , J. Appl. Phys. , Vol 28 , p. 362 , 1957 13...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005413
EISBN: 978-1-62708-196-2
..., can be established only under the supposition that the crystal does not yield first. The yield stress is the stress level where dislocations are forced to move and to produce a plastic shear strain by slip of lattice planes in certain lattice directions. The yield strength of a material depends...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004018
EISBN: 978-1-62708-185-6
... DEFORMATION, or the permanent distortion under applied stress, can occur in metals from various mechanisms, such as: Slip from the motion of dislocations (line imperfections) in the crystal structure Twinning, where the crystallographic orientation changes significantly in the region of plastic...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003287
EISBN: 978-1-62708-176-4
.... , Vol. 18, 1983 , p 1 – 50 10.1007/BF00543808 8. Cannon W.R. and Langdon T.G. , Review: Creep of Ceramics, Part 2 , J. Mater. Sci. , Vol 23 , 1988 , p 1 – 20 10.1007/BF01174028 9. Mohamed F.A. and Langdon T.G. , The Transition from Dislocation Climb...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004019
EISBN: 978-1-62708-185-6
... to a lower energy level. All three processes involve diffusion and thus depend on thermal activation to cause rearrangement of dislocations and grain boundaries. The mechanisms of recovery and recrystallization also depend on the extent of plastic deformation (either during hot working or by cold work prior...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003254
EISBN: 978-1-62708-176-4
... Deformation of Metals , 2nd ed. , Edward Arnold , London , 1984 5. Hull D. and Bacon D.J. , Introduction to Dislocations , Pergamon Press , London , 1984 6. Keh A.S. , Direct Observations of Imperfections in Crystals , Newbrick J.B. and Wernick J.H. , Ed...