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boundary sliding

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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
... with spherical particles of silicon dioxide (at arrows). Original magnification 6000×. Courtesy of J. Humphries Fig. 42 Al-1.91Mg alloy deformed 0.62% at 265 °C (510 °F) showing grain-boundary sliding. The sliding is revealed by the shear offsets of the surface scratches (vertical lines) at a grain...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003292
EISBN: 978-1-62708-176-4
... with a creep process: the stress and strain rate, strain rate or stress and temperature, strain rate or stress and grain size, and strain contributed by boundary sliding and total strain. The article describes the deformation characteristics and mechanisms of low-stress region, intermediate-stress region...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006398
EISBN: 978-1-62708-192-4
..., and wear mitigation of sliding bearings. The lubrication of bearings includes thick-film lubrication, thin-film lubrication, and boundary lubrication. The article concludes with a discussion on the effects of material elasticity on the lubrication of bearings. References References 1. Kingsbury...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005458
EISBN: 978-1-62708-196-2
... Fig. 1 Schematic illustrations of grain-boundary sliding events that open voids at grain-boundary triple junctions. The simplicity of these sliding events ignores the distribution of strains and stresses that can occur in various parts of a polycrystalline solid. Fig. 2 Calculated...
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
... of superplasticity. Source: Ref 28 Fig. 4 Schematic illustration of grain-boundary sliding in two types of microstructural conditions: (a) for d > λ and (b) for d < λ. Source: Ref 31 Abstract Abstract This article presents a mechanical description of superplasticity and discusses...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002410
EISBN: 978-1-62708-193-1
... A. , Correlation of Creep-Fatigue Crack Growth Rates Using Crack Tip Parameters , Proc. 7th Int. Conf. Fracture: ICF-7 , Salama K. et al. , Ed., Pergamon Press , 1989 , p 189 – 196 116. Raj R. and Ashby M.F. , On Grain Boundary Sliding and Diffusional Creep , Metall. Trans. , Vol...
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
... in temperature or decreases in grain size shift the σ- ε ˙ curve downward and to the right. The same changes produce a somewhat higher value of m , as shown in (b). Fig. 23 The grain-switching mechanism of Ashby and Verrall. Relative grain-boundary sliding produces a strain (c) without...
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
... ), and so on. While these have broadened the view of the underlying physics of micrograin superplasticity, controversy still exists on the details of the microscopic process of deformation. A few known facts are: Sliding of grains along grain boundaries is observed ( Ref 46 ) Both grain stretching...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009003
EISBN: 978-1-62708-185-6
... increases that produce local softening. Increasing the temperature of deformation leads to significant changes in deformation behavior and fracture mode. At temperatures above one-half the melting point, particularly at low strain rates, grain-boundary sliding becomes prominent. This leads to wedge...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.9781627081856
EISBN: 978-1-62708-185-6
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002472
EISBN: 978-1-62708-194-8
.... , Acta Metall. , Vol 20 , 1572 , p 887 – 897 10.1016/0001-6160(72)90082-X 18. Bell R.L. and Langdon T.G. , Grain Boundary Sliding , Interfaces Conf. , Gifkins R.C. , Ed., Butterworths , 1969 , p 115 – 137 19. Walter J.L. and Cline H.E. , Grain...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009013
EISBN: 978-1-62708-185-6
... of grain-boundary sliding or cooperative grain-boundary sliding within the material ( Ref 8 ). Consequently, although a given processing map might seem suitable to design how a material should be processed under specific conditions, it might not correspond to the controlling mechanism throughout...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005409
EISBN: 978-1-62708-196-2
... , Brandon D.G. and Rosen A. , Ed., Israel Universities Press , Jerusalem, Israel , 1969 , pp. 255 – 342 . 45. Gifkins R.C. , Grain-Boundary Sliding and Its Accommodation during Creep and Superplasticity , Metall. Trans. A , 1976 , Vol 7A , pp. 1225 – 1232 . 46. Graham...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... the material, temperature-assisted grain-boundary evolution, and temperature-driven surface oxidation, among other things. This article discusses some of the major aspects and challenges of dealing with TMF life prediction. It describes the damage mechanisms of TMF and covers various experimental techniques...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... the temperature of deformation leads to significant changes in deformation behavior and fracture mode. At temperatures above one-half the melting point, particularly at low strain rates, grain-boundary sliding becomes prominent. This leads to wedge-shaped cracks that propagate along grain boundaries and result...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... tested at 815 °C (1500 °F). 350 ×. Specimens at bottom etched with mixture of HCl, HNO 3 , and H 2 O. Fig. 75 One mechanism of intergranular cracking. (a) Schematic showing cracking due to grain-boundary sliding. Arrows along a grain boundary indicate that this boundary underwent sliding. (b...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... changes, such as slip bands, grain-boundary sliding, cavity formation and growth, and cracking (grain boundary, interphase boundary, and transgranular). Other potential microstructural changes include in situ graphitization that occurs in iron-base alloys without adequate carbide-stabilizing elements...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.9781627081863
EISBN: 978-1-62708-186-3
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
... Small spherical γ′ precipitates to provide strength Large grains to reduce the intrinsic creep rate by reducing the grain-boundary area and therefore the grain-boundary sliding Grain-boundary carbides (in polycrystalline materials) to reduce the creep rate by inhibiting grain-boundary sliding...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003288
EISBN: 978-1-62708-176-4
.../mole n Q , kJ/mole 1 1 4 Cr- 1 2 Mo steel 510–620 950–1150 4 400 10 625 Grain boundary sliding at low stresses and matrix deformation at high stresses 10 2 1 4 Cr-1Mo steel 565 1050 2.5 … 12 … Deformation governed by matrix deformation 11...