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Rolling-contact wear

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... of the particular wear problem. Erosive Wear Erosive wear (or erosion) occurs when particles in a fluid or other carrier slide and roll at relatively high velocity against a surface. Each particle contacting the surface cuts a tiny particle from the surface. Individually, each particle removed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350043
EISBN: 978-1-62708-315-7
... encountered, that is, sliding, impact, and rolling contact ( Fig. 2 ). Budinski reduces wear processes into four categories, that is, abrasion, erosion, adhesion, and surface fatigue ( Fig. 3 ). Although both of the wear classifications schemes shown in Fig. 2 and 3 have merit, they also point out...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300079
EISBN: 978-1-62708-323-2
... debris. A common concept used in modeling of wear processes is that surfaces are perfectly flat and their surface texture can be described as asperities of differing heights; asperities are usually modeled as cones. People in contact mechanics can assign size and height to asperities on surfaces and use...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... in ASM Handbook , Volume 18, Friction, Lubrication, and Wear Technology ( Ref 2 ) can be employed to calculate real areas of contact, but doing so quickly shows how surfaces deform under ball or line contacts so that even one portion of a ball contact in a ball bearing experiences pure rolling...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... of hardened steel gears, rolling-element bearings, roller cams, and other parts or assemblies where there is a combination of rolling and sliding motion. The parts subject to wear fatigue failure generally have two convex, or counterformal, surfaces in contact under load. Typical components...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300121
EISBN: 978-1-62708-323-2
... or device fail. Electronics manufacturers are doing their best to eliminate all tribosystems that involve materials in sliding contact. Switches used to have sliding members (a tribosystem) that was subject to the vicissitudes of friction and wear. Now, many switches work by infrared sensing or some...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... Failure mode Type of failure Fatigue Tooth bending, surface contact (pitting or spalling), rolling contact, thermal fatigue Impact Tooth bending, tooth shear, tooth chipping, case crushing, torsional shear Wear Abrasive, adhesive Stress rupture Internal, external List of contact...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.9781627083232
EISBN: 978-1-62708-323-2
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250311
EISBN: 978-1-62708-345-4
...Example of rolling/sliding contact fatigue test data Table 1 Example of rolling/sliding contact fatigue test data Lubricant, automatic transmission fluid. Bulk temperature, 90 °C (194 °F). Filter, 10 mm (nominal). Test speed, 1330 rpm. Phasing gear set, 16 tooth/56 tooth. Slide/roll ratio, 43...
Image
Published: 01 March 2001
Fig. 2 Major categories of wear classified by the type of relative motion encountered (sliding, impact, and rolling contact). Using this classification system, galling, scuffing, and scoring are not strictly considered forms of wear because material is not necessarily removed (it may instead More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... between applied stresses and crack propagation in the part (see references for more detail). 16.1 The Many Faces of Wear Wear is mechanically induced surface damage that results in the progressive removal of material due to the relative motion between the subject surface and a contacting medium...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
... would be rubbing all the time and they would fail from wear or rolling contact fatigue (pits and spalling in the balls and raceways). The life of the bearing would be only a fraction of the life lubricated. When properly lubricated and at the proper speed, the rollers and raceways do not touch...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... for unusual conditions Fig. 7 Probability of wear distress as a function of specific film thickness and pitch line velocity (in ft/min). Source: Ref 18 Fig. 9 Plot of contact temperature versus pinion roll angle for gear tooth geometry of scuffed gearset. Maximum T c , 226 °C (439 °F...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630169
EISBN: 978-1-62708-270-9
... on the rolling elements. The term false Brinelling is sometimes used to describe the indentations. However, the mechanism of failure actually is fretting wear. Fretting also is a serious problem on parts such as shafts, where it can initiate fatigue cracking on the contacting surfaces. In fact, many fatigue...
Image
Published: 01 December 2003
Fig. 5 Waves of detachment when an elastomer is slid against a hard and smooth surface. The rubber moves forward in the form of ripples of wave on its contact surface with a smooth and hard counterface. These so-called waves of detachment can produce wear in the form of rolls of detached More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350231
EISBN: 978-1-62708-315-7
...- cles slide or roll across the surface under pressure. The particles may be loose or may be part of another surface in contact with the surface being abraded. Compare with adhesive wear. accelerated corrosion test. Method designed to approximate, in a short time, the deteriorating effect under normal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300001
EISBN: 978-1-62708-323-2
... of a solid surface by the action of rubbing, sliding, or rolling in contact with another material or substance/ substances (Fig. 1.8). Fig. 1.8 Wear of a cam follower. There was no step in the outside diameter when it was new. Fig. 1.7 Scuf ng of a gear tooth 12 / Tribomaterials: Properties and Selection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350195
EISBN: 978-1-62708-315-7
... or Rolling Contact with Another Surface <xref rid="t68350195-ref1" ref-type="bibr">(Ref 1)</xref> If the part is in sliding or rolling contact with another engineering component then, even if it is lubricated, there is the likelihood of adhesive wear. Adhesive wear can occur in many engineering...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300199
EISBN: 978-1-62708-323-2
... wear occurs on hills and on curves where wheel flanges rub on the side of rails and wear both. Surface fatigue may be more of an issue than wear. Spalling from surface fatigue caused by repeated rolling contact can lead to rail fractures and derailments ( Fig. 8.6 ). Some tracks are locally flame...