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interfacial friction

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Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009000
EISBN: 978-1-62708-186-3
..., microstructure, interfacial friction, surface temperatures, and wear rate. high-strength steels stampings interfacial friction microstructure mild steel surface morphology surface roughness surface temperature wear rate IN AN EFFORT to improve the fuel economy of automotive vehicles, various...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009009
EISBN: 978-1-62708-185-6
... is compressed in the axial direction, the change in dimensions depends on the amount of compression in the thickness direction and the frictional conditions at the platen/ring interfaces. If the interfacial friction were zero, the ring would deform in the same way as a solid disk, with each element flowing...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006377
EISBN: 978-1-62708-192-4
... Abstract Transition metal dichalcogenides (TMD) are solid lubricant materials, specifically, intrinsic solid lubricants, whose crystal structure facilitates interfacial sliding/shear to achieve low friction and wear in sliding contacts and low torque in rolling contacts. This article provides...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
..., the focus of this article is on the wear of polymers when slid against metallic surfaces. Interfacial Wear The notion of interfacial wear arises from the popular two-term model of frictional energy dissipation ( Ref 2 ). This model states that in any frictional phenomenon, where frictional energy...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006850
EISBN: 978-1-62708-395-9
... motion. (d) A raised lip of elastomer is formed, but no material is actually removed. (e) A typical friction/scratching force profile when a slider is passed over an elastomer. Reprinted with permission from Ref 1 . Fig. 1 Interfacial wear processes. (a) Initial contact of the two surfaces. (b...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
.... The article describes the behavior of oxide scale on the surface of hot metal undergoing thermomechanical processing. It concludes with information on the effects of process and material parameters on interfacial phenomena. deformation metal-forming microforming surface interactions friction...
Image
Published: 31 December 2017
Fig. 7 Typical Stribeck curve, which depicts friction regimes for sliding lubricated surfaces categorized as solid/boundary friction, mixed friction, and fluid friction. The friction coefficient is a function of the ratio λ of interfacial lubricant film thickness and surface roughness More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009007
EISBN: 978-1-62708-185-6
... with Hill's variational principle ( Ref 12 ), the authors developed the following expression for the uniaxial compressive flow stress. This assumes a von Mises yield criterion and an interface friction factor m = 3 τ i / σ 0 where τ i is the interfacial shear (friction) component...
Image
Published: 31 December 2017
Fig. 13 Wear mode as a function of the friction factor, f HK , and the attack angle, θ. The friction factor is a dimensionless shear-strength parameter defined as the quotient of the interfacial shear stress and the shear strength of the soft metal. More
Image
Published: 01 November 1995
Fig. 1 Schematic of a polymer surface in contact with a hard asperity. Two friction dissipation zones are shown: the interfacial shear zone and the deformation zone. Source: Ref 4 More
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006403
EISBN: 978-1-62708-192-4
... processes in the stochastically distributed microscale contacts of the interfacial region cause the frictional resistance against motion, independently from the nominal geometric contact area. Compared with a conformal contact geometry, counterformal contact takes place in an extremely small...
Image
Published: 15 May 2022
Fig. 1 Interfacial wear processes. (a) Initial contact of the two surfaces. (b) Running-in process in which the soft polymer molecules are transferred to the hard counterface. (c) Steady-state wear process in which the wear and friction phenomena are influenced mainly by the shear and adhesive More
Image
Published: 01 January 2002
Fig. 1 Interfacial wear processes. (a) Initial contact of the two surfaces. (b) Running-in process where the soft polymer molecules are gradually transferred to the hard counterface as third-body. (c) Steady-state wear process where the wear and friction phenomena are influenced mainly More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004013
EISBN: 978-1-62708-185-6
... to represent the actual deformation conditions for the process variables employed. Results of these calculations are expressed in the form of processing maps such as that shown in Fig. 10 . In this example, the ordinate is the interfacial friction factor, representing the ratio of the friction stress...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006375
EISBN: 978-1-62708-192-4
... materials. The coefficient of friction for atomically clean surfaces of metal-ceramic couples, which reflects interfacial adhesion, was found to correlate with the metal’s total surface energy γ in the real area of contact A (i.e., the product γ A ). The coefficient of friction increased as the total...
Image
Published: 01 January 2001
Fig. 4 The adhesion of the A-4 carbon fibers to the epoxy matrix, as quantified through single-fiber fragmentation tests. The fiber-matrix adhesion increases in the order AU-4 > AS-4 > AS-4C. AU-4 has the lowest level of adhesion and fails by a frictional debonding mode; AS- 4 has More
Image
Published: 31 December 2017
by indenting hard asperities of contacting bodies or hard particles (microcutting, microplowing, microcracking). (c) Adhesion. Formation and rupture of adhesive interfacial cold weld spots, materials transfer, and generation of wear debris. (d) Tribochemical reaction. Chemical materials/atmosphere/lubricant More
Book Chapter

Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003280
EISBN: 978-1-62708-176-4
... liquid films ( Ref 15 , 16 ), and the friction between two molecularly smooth solids ( Ref 17 ). Thermodynamic Adhesion Thermodynamic adhesion refers to the change in free energy when an interface is formed or separated. This concept of adhesion is defined in terms of surface energy, interfacial...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006402
EISBN: 978-1-62708-192-4
... of adhesive interfacial cold weld spots, materials transfer, and generation of wear debris. (d) Tribochemical reaction. Chemical materials/atmosphere/lubricant reaction (activated by frictional energy), formation of reaction products, and wear particles Presentation of Friction and Wear Data...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005574
EISBN: 978-1-62708-174-0
... Abstract This article discusses three distinct mechanisms of bonding for solid-state (forge) welding processes, namely, contaminant displacement/interatomic bonding, dissociation of retained oxides, and decomposition of the interfacial structure. It explains the processes that can...