Applicability of ring‐on‐disc and pin‐on‐plate test methods for Cu–steel and Al–steel systems for large area conformal contacts

Pondicherry, Kartik; Grün, Florian; Gódor, István; Bertram, Rich; Offenbecher, Martin

doi:10.1002/ls.1187

Cited by 15 publications

(7 citation statements)

References 13 publications

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“…The wear of the softer bearing material was measured gravimetrically. Further details of the used test methodology are given in previous works of the authors [8][9][10][11].…”

Section: Test Methodologymentioning

confidence: 99%

Tribological study of crankshaft bearing systems: Comparison of forged steel and cast iron counterparts under start–stop operation

Summer

Grün

Schiffer

et al. 2015

Wear

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“…The wear of the softer bearing material was measured gravimetrically. Further details of the used test methodology are given in previous works of the authors [8][9][10][11].…”

Section: Test Methodologymentioning

confidence: 99%

Tribological study of crankshaft bearing systems: Comparison of forged steel and cast iron counterparts under start–stop operation

Summer

Grün

Schiffer

et al. 2015

Wear

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“…It allows to evaluate the effects of each condition on wear of EJBs discarding the effects of other variable parameters. It facilitates accurate measurements of wear volumes generated in EJBs and easy test execution in contrast to other kind of tests, namely, full-scale tests using high-speed diesel engines, 15 testers to evaluate entire EJBs, 16–19 the ring-on-block tester, 11,20,21 and the pin-on-disk tester. 20,22,23 Usually, these testers involve long tests, preparation of special EJB sample, advanced surface analysis, control, and measurement techniques.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the wear of engine journal bearings approaching severe lubrication conditions using a microabrasion tester

Hernández-Peña

Farfán-Cabrera

Gallardo-Hernández

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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Ideally, engine journal bearings are expected to operate under hydrodynamic lubrication regime to limit wear and promote minimal friction by sliding. Nevertheless, engine journal bearings fail since wear caused by severe conditions in actual engine operation, such as start/stop, misalignment, lubricant degradation, overheating, and debris contamination, producing a transition from hydrodynamic to mixed and boundary lubrication regimes and wear increased in both engine journal bearings and crankshaft. Thus, this work aims to study the influence of boundary lubrication, engine mineral oil aging, and debris contamination on wear of engine journal bearings. An adapted microscale abrasion tester using a ball-on-concave flat configuration was used to reproduce boundary lubrication under controlled conditions. Steel balls having a similar surface than crankshafts and concave flat samples cut from actual engine journal bearings were tested. The tests were run under boundary lubrication at a constant load, speed, and sliding distance at 26 ℃ and 100 ℃ using separately clean fresh and aged engine mineral oil, and then, tests were conducted using the oils contaminated with hard abrasive particles. The engine mineral oil was degraded by a laboratory aging process approaching oxidation of an engine mineral oil used in actual use conditions. Oxidation, additives depletion and changes in viscosity were evaluated. The wear volumes and scar morphologies of engine journal bearing samples were analyzed. The results suggested that high temperature was the main contributor for wear increase in engine journal bearings, while oil aging and debris did not influence considerably on the wear. However, the oils contaminated with hard particles produced a wear decrease in engine journal bearing samples but increased wear in rotary balls.

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“…In several studies, the tribological performance of JBs has been investigated by using different methodologies and testers, the most common being the pin-on-disk tester, full-scale test rigs and the block-on-ring tester [3,[22][23][24][25]. Also, experimental tests combined with simulation works have been used to investigate wear caused by metal-to-metal sliding contact in the start-stop process in JBs [6,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Abrasive Particles on a Journal Bearing With a Soft Coating (Pb-Cu-Al) Under Boundary Lubrication Conditions

Hernández-Peña¹,

Gallardo-Hernández²,

Cabrera³

et al. 2019

PES

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Some times operating conditions, namely, misalignment, overheating and the start/stop of engine generate boundary lubrication conditions increasing wear of journal bearings (JBs). Thus, debris are a consequence of wear and fatigue either from JBs or other lubricated mechanical components. Debris are commonly immersed in the oil and recirculated through the entire lubrication system interacting with all the lubricated mechanical elements and accelerating wear rate due to three-body abrasion. The aim of this work is to evaluate the effects of abrasive particles on the wear behaviour of sections of an actual JB coated with a soft alloy (Pb-Cu-Al) by replicating boundary lubrication in JBs using a micro-scale abrasion test setup. Steel balls were used to replicate the shaft counter face for the tests. Initially, the tests were carried out with a slurry prepared with distilled water and SiC micro-particles at a concentration of 20% vol. On the other hand, a SAE 10W-30 engine oil was blended with SiC micro-particles at different concentrations to replicate an engine oil contaminated with abrasive particles. The slurry was tested at 26°C while the contaminated oil was tried at two different oil temperatures (26 and 100°C). The wear scars produced were measured and analysed by optical microscopy, SEM and contact profilometry. It was found that clean oil generated higher wear than oil contaminated with SiC particles at different concentrations since a layer of SiC particles was generated on the scars by embedment of many particles in the soft coating. It acted as protective layer for the JB's coating reducing wear. However, it generated significant wear in the ball surface.

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Applicability of ring‐on‐disc and pin‐on‐plate test methods for Cu–steel and Al–steel systems for large area conformal contacts

Cited by 15 publications

References 13 publications

Tribological study of crankshaft bearing systems: Comparison of forged steel and cast iron counterparts under start–stop operation

Tribological study of crankshaft bearing systems: Comparison of forged steel and cast iron counterparts under start–stop operation

Investigation of the wear of engine journal bearings approaching severe lubrication conditions using a microabrasion tester

Study of the Influence of Abrasive Particles on a Journal Bearing With a Soft Coating (Pb-Cu-Al) Under Boundary Lubrication Conditions

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