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lubricated wear

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Published: 01 January 2002
Fig. 3 Examples of mild and severe wear morphology. (a) A lubricated sliding wear scar on steel in the mild wear regime. (b) The appearance of the same type of scar in the severe wear regime More
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Published: 01 January 2002
Fig. 13 Results of lubricated compound impact wear experiments ( Ref 29 ). ( V is impact velocity and v = sliding velocity; ×: v = 0 m/s; •: v = 0.25 m/s; □: v = 1.27 m/s; ▲: v = 3.81 m/s) More
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Published: 01 January 2002
Fig. 2 Wear surface by cavitation of copper-base alloy in a lubricated gearbox. Courtesy of CETIM More
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Published: 15 January 2021
Fig. 15 Results of lubricated compound-impact wear experiments. V = impact velocity and v = sliding velocity; x: v = 0 m/s (0 ft/s); ●: = 0.25 m/s (0.8 ft/s); □ : v = 1.27 m/s (4.2 ft/s); ▴: v = 3.81 m/s (12.5 ft/s). Source: Ref 4 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046388
EISBN: 978-1-62708-224-2
.... A maintenance lubrication program was not suggested, but galling could be reduced by periodic application of a solid lubricant. Bolts Galling Molybdenum disulfide Solid lubricants Wear resistance 4140 UNS G41400 Abrasive wear Heat treating-related failures Figure 1 shows a bolt...
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Published: 01 January 2002
Fig. 8 Examples of adhesive-type wear caused by inadequate lubrication. (a) Metal pickup on a roller outside diameter from sliding contact on the cage shown in (b). Approximately actual size. (c) The end of the same roller showing the scoring damage from the rolling-sliding contact More
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Published: 15 January 2021
Fig. 9 Schematic of the influence of lubrication regime on rolling-sliding wear. Adapted from Ref 5 More
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
..., g/cm 3 7.45 6.74 7.45 Porosity, % 0 7.7 0 Grain size of β-phase, µm 100 10 to 20 150 50 Grain size of α-phase, µm 0.5 0.5 to 1.0 0.5 to 1.0 Wear intensity at dry sliding, mg/mm 3 11.5 × 10 −8 8.6 × 10 −8 9.7 × 10 −8 Wear intensity with lubricant, mg/mm 3 6.1...
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
...; in extreme cases, sliding motion can be prevented by a very high coefficient of friction or a combination of material transfer and adhesion. Metals and alloys are particularly prone to adhesive wear, with the majority of adhesive wear failures being related to the breakdown of the lubrication film...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... mechanics fracture modes fracture surface lubricants macroscopic examination mechanical testing microscopic examination nondestructive inspection sampling simulated-service testing stress analysis wear failure ANALYZING the inevitable failures that occur during testing, manufacturing...
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
... analysis of sliding bearings are also covered. Finally, the article discusses wear-damage mechanisms from the standpoint of bearing design. bearing design elastohydrodynamic lubrication failure analysis lubricants sliding bearings wear MECHANICAL EQUIPMENT usually contains moving parts...
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
... Abstract Tribology is the study of contacting materials in relative motion and more specifically the study of friction, wear, and lubrication. This article discusses the classification and the mechanisms of friction, wear, and lubrication of polymers. It describes the tribological applications...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0092102
EISBN: 978-1-62708-234-1
... (frictional wear). No recommendations were made. Gears Lubrication Nylon (Other, miscellaneous, or unspecified) wear Figure 1 shows pitting on the tooth flank of a nylon oil-lubricated driving gear. The pitting produced numerous surface microcracks in association with large-scale fragmentation...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001078
EISBN: 978-1-62708-214-3
... were examined using SEM microscopy. Failure of the gears was attributed to heavy wear resulting from misalignment. A lack of adequate lubrication was also noted. Periodic alignment adjustment and lubrication were recommended. Catastrophic wear Gear teeth Nuclear reactor components Tin bronze...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047998
EISBN: 978-1-62708-225-9
... was observed. It was concluded that overheating was caused by lubricant flow was permitted by wear of the labyrinth seals. Positive rubbing seals and MIL-G-81322 grease lubricant were found to have longer life than those with the labyrinth seals and mineral-oil-paste lubricant on testing under simulated...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... bearings are designed on the principle of rolling contact rather than sliding contact; frictional effects, although low, are not negligible, and lubrication is essential. The article lists the typical characteristics and causes of several types of failures. It describes failure by wear, failure by fretting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001485
EISBN: 978-1-62708-225-9
... steel Spalling wear Rolling-contact wear Fretting wear Introduction Ball and roller bearings are precision-made articles subjected to rigorous inspection at all stages during manufacture and, if carefully fitted, adequately lubricated, and worked under conditions of speed and load...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001740
EISBN: 978-1-62708-234-1
... Abstract The contamination of lubrication with powdered stone resulted in progressive wear of the internal surfaces of a bearing. Because of the motion of rollers, the inner race exhibited an unusual cyclic washboard wear pattern. Because of a lack of bearing conformity, wear progressed...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003558
EISBN: 978-1-62708-180-1
... based on the characterization of the elements of the tribosystem at the contact. The nominal type of motion, that is rolling, sliding and impact, and in the case of sliding, lubricated or nonlubricated wear, often are considered as major subcategories of nonabrasive wear situations. Some subcategories...
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
... blades; centrifugal pumps; ship propellers; high-speed lubricated sliding bearings Corrosive wear Wear conjoint with corrosion, as in a metal bushing versus a shaft immersed in water Rolling wear occurs when two bodies roll one over the other. Some sliding always occurs in the contact region...