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Rolling-contact wear

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350043
EISBN: 978-1-62708-315-7
... circumferential speed), rod spinning between three captive balls Rolling with slip Disk-on-disk rolling contact (unequal circumferential speed) Fig. 6 Schematics illustrating the four types of abrasive wear. (a) Low-stress abrasion where material is removed by hard, sharp particles or other hard...
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 wear track formed by the mating roller, which was 125 mm (5 in.) in diameter. Source: Ref 7 Fig. 19 Schematic of rolling/sliding contact. (a) The situation shown in Fig. 18 changes drastically if the rollers are externally driven and forced to rotate with different surface velocities...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300079
EISBN: 978-1-62708-323-2
... • “ Standard Test Determining Synergism between Wear and Corrosion ,” ASTM G119, ASTM International , 2015 • Stolarski T.A. , Tobe S. , Rolling Contacts , Wiley , New York , 2000 10.1002/9781118903001 • Totten G.E. , Ed., Friction, Lubrication, and Wear Technology...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... of a treatment between members in a rolling tribosystem. The famous Hertz equations located on page 7 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...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... of gear failure analysis. contact fatigue failure analysis fatigue failure gears macropitting micropitting rolling-contact fatigue scuffing spalling stress rupture subcase fatigue thermal fatigue wear GEARS can fail in many different ways, and except for an increase in noise level...
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: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.9781627083232
EISBN: 978-1-62708-323-2
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...
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
... speed, 1330 rpm. Phasing gear set, 16 tooth/56 tooth. Slide/roll ratio, 43%. Contact stress, 400 ksi. Load, 3000 lb. Test No. Specimen No. Test duration R a (a) λ (b) Wear (c) , in. Wear rate (d) Comments 10 6 cycles h Specimen Load roller 1.173 14.7 13.5 3.8 3...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... and a contacting medium. A contacting medium may consist of another surface, a fluid, or hard, abrasive particles contained in some form of fluid or suspension, such as a lubricant for example. More than one type of wear can attack the same component. Examples include erosive wear and abrasive wear on extrusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... . Nomenclature and units of measure used in this chapter to discuss friction, lubrication, and wear of gears Table 1 Nomenclature and units of measure used in this chapter to discuss friction, lubrication, and wear of gears Symbol Description Units B M Thermal contact coefficient lbf...
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 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630169
EISBN: 978-1-62708-270-9
.... Because this, unfortunately, does not always occur, there may be problems with adhesive 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300199
EISBN: 978-1-62708-323-2
... 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 hardened where spalling is evident, and in some places alloy steels containing manganese (13...
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 a thrust pad. 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 situations, for example, shafts, journals, pistons and rings, cams, bearings, pads...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770077
EISBN: 978-1-62708-337-9
... Layers on Rolling Wear , Neue Hütte , Vol 29 ( No. 12 ), Dec 1984 , p 452 – 455 • Vinokur B.B. and Geller A.L. , The Effect of Retained Austenite on Contact Fatigue in Cr-Ni-W Carburized Steel , J. Met. , Vol 49 ( No. 9 ), Sept 1997 , p 69 – 71 10.1007/BF02914356...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... 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 In an analysis of more than 1500 studies, the three most common failure modes, which...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300271
EISBN: 978-1-62708-323-2
.... However, block-on-ring studies of alumina, SiC, Si 3 N 4 , and ZrO 2 suggest ceramic/ceramic couples gall and do not like to rub on each other. The solid ceramic couples produced sparks emanating from the contact, and the friction and noise were high. The wear scars showed severe adhesive wear (lots...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410315
EISBN: 978-1-62708-265-5
... of pearlitic microstructures in a series of rail steels ( Ref 15.11 ). The latter results were generated by rolling/sliding wear tests in which the maximum Hertzian contact pressure was varied by adjusting the loads applied by test rollers. As shown in Fig. 15.4 and 15.5 , increasing contact pressure...