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friction and wear properties

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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
... 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 properties of the transferred film. Reprinted with permission from Ref 1 A distinction within the interfacial...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
... properties when compared to polymers. However, in mechanical systems such as bearings, using polymers can reduce friction, wear, and maintenance requirements, which results in a longer system lifetime. Understanding the mechanisms of friction and wear and how to characterize these properties in material...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006869
EISBN: 978-1-62708-395-9
... proper wear properties that are suitable for a wide range of applications. Thus, numerous studies have been conducted to investigate and control the frictional and wear behaviors of polymers using various chemical and physical modifications that can be used in different tribosystems in order...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... on the operating conditions and material properties, is introduced into Eq 1 as a modifier. The wear volume is then described as: (Eq 2) W = K ad ∙ F N ∙ L H The adhesive wear coefficient, K ad , is the principal value for a friction pair describing its wear rate. The physical...
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
...) Steady-state wear process where the wear and friction phenomena are influenced mainly by the shear and adhesive properties of the transferred film. Reprinted with permission from Ref 1 A distinction within the interfacial wear process may be made based on whether or not the frictional heat...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003572
EISBN: 978-1-62708-180-1
... composites (SFRP and particulate-filled), unidirectional FRP composites, and fabric reinforced composites. Friction and wear performance of the composites, correlation of performance with various materials properties, and studies on wear-of failure mechanisms by scanning electron microscopy are discussed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001533
EISBN: 978-1-62708-225-9
... consists of a number of parallel wear furrows, which are characteristic of metal wear. 1 , 2 The presence of large reoriented areas that can in the process of friction form cracks and crumble is remarkable. Individual cracks were observed to be located across the friction furrows of a worn-out surface...
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 Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001783
EISBN: 978-1-62708-241-9
... provides information on not only better materials, but also design changes intended to reduce wear and increase service life. bushing wear relative hardness aluminum bronze distortion microstructural analysis coefficient of friction AMPCO 45 (aluminum bronze) UNS 63000 D2 (high carbon, high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001530
EISBN: 978-1-62708-225-9
... Content on the Wear Characteristics of a Stir-Cast Al-Pb Alloy,” Wear , 1990 , 140 , pp. 83 – 92 . 12. Tabor D. : “The Frictional Properties of Some White Metal Bearing Alloys: The Role of the Matrix and the Hard Particles,” J Appl. Phys. , 1945 , 16 , pp. 325 – 37 . 13...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
... between the crack faces. Several attempts have been made to explain the wear mechanisms in brittle materials ( Ref 19 ). In the case of brittle materials, cracks may occur on the surface, due to tension or subsurface cracks parallel to the contact path due to shear. Friction in rolling and sliding...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... loop, the friction energy, E d (J) (i.e., friction work), inputted in the interface can be estimated. Both E d (J) and δ S variables can be considered to quantify the wear rate. Fretting Sliding Condition Most of the research work and industrial feedback emphasize that fretting damage...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... of impingement angle on erosive wear. Source: Ref 12 Properties of the Wear Material The properties of the wearing material that influence wear behavior are grouped into the following categories: mechanical properties, microstructure effects, and other properties (corrosion resistance, friction...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... The properties of the wearing material that influence wear behavior are grouped into the following categories: mechanical properties, microstructure effects, and other properties (corrosion resistance, friction, thermal effects). Because abrasive wear is primarily a mechanical process, particularly...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001831
EISBN: 978-1-62708-241-9
... and contact surfaces. Chemical and thermal properties of the bearing grease were also examined. The investigation revealed that the failure was caused by wear due to dry friction and impact, both of which worsened as a result of high-temperature degradation of the bearing grease. Fatigue cracks initiated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001575
EISBN: 978-1-62708-217-4
... and nitrided to a surface hardness in the range of 750 ÷ 950 HV, for high wear resistance properties. Core hardness is maintained in the range of 34 ÷ 44 HRc for good toughness properties. [ref as nr. 170 & 230 in Figure 1 ] Fig. 1 The spacers are produced by forced assembling of a Cu alloy...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1
... of friction ( Fig. 22 ). Fig. 22 Plot of fretting wear versus fiber orientation angle in a composite In experiments involving the fretting of sintered alumina against a wide variety of metallic materials in a crossed-cylinder configuration, no detectable wear was found on the alumina, although...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
..., but axial grooves are easier to make. Fig. 3 Groove arrangements in sliding bearings Apart from axial, circumferential, and spiral grooves, the surfaces of bearings may be textured to improve wear resistance and reduce energy losses by reducing friction. In recent years, improving or modifying...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
..., becoming transferred particles that, in the long run, may form a friction layer between the mating surfaces. Alternatively, the fragments may be expelled from the contact region and become loose wear fragments. In general, when the two materials in contact have different hardness properties, the one...