Influence of hardness of the harder body on wear regime transition in a sliding pair of steels

Viáfara, C.C.; Sinatora, Amilton

doi:10.1016/j.wear.2008.11.019

Cited by 76 publications

(34 citation statements)

References 36 publications

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“…This obtained variation of the wear rate with the sliding velocity is in accordance with reported results from a previous study [20]. Moreover, the wear rate results might be attributed to that T1 and T2 wear regime transitions take place for steels when the sliding velocity is increased [21][22][23]. To be specific, a first transition from mild to severe wear occurs at a critical low sliding velocity (around 0.4 m/s).…”

Section: Discussionsupporting

confidence: 91%

Effect of the Sliding Velocity on the Size and Amount of Airborne Wear Particles Generated from Dry Sliding Wheel–Rail Contacts

et al. 2016

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A set of frictional experiments have been conducted on a pin-on-disk apparatus to investigate the effect of the sliding velocity on airborne wear particles generated from dry sliding wheel-rail contacts. The size and the amount of generated particles were acquired by using particle counter instruments during the whole test period. After the completion of tests, the morphology and chemical compositions of pin worn surfaces and collected particles were analyzed by using scanning electron microscopy combined with an energy-dispersive X-ray analysis system. The results show that the total particle number concentration increases dramatically with an increased sliding velocity from 0.1 to 3.4 m/s. Moreover, the fine and ultrafine particles (\1 lm) dominates the particle generation mode in the case of a high sliding velocity (1.2 and 3.4 m/s). The contact temperature variation is observed to be closely related to the size mode of the particle generation. In addition, the sliding velocity is found to influence the active wear. Correspondingly, an oxidative wear is identified as the predominant wear mechanisms for cases with high sliding velocities (1.2 and 3.4 m/s). This produces a substantial number of iron oxide-containing particles (\1 lm) and reduces the wear rate to a relative low level (the wear rate for a 3.4 m/s sliding velocity is 4.5 % of that for a 0.4 m/s sliding velocity).

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Section: Discussionsupporting

confidence: 91%

Effect of the Sliding Velocity on the Size and Amount of Airborne Wear Particles Generated from Dry Sliding Wheel–Rail Contacts

et al. 2016

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“…The surface hardness of the contact partners also influences friction and wear [9]. Bhushan investigated the influence of contact pressure on the friction for metallic contacts under lowest loads.…”

Section: Introductionmentioning

confidence: 99%

Micro Tribological Investigations on Dry Sliding Friction of 100Cr6 Axial Bearing Surfaces

2016

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A detailed knowledge of the interface between a sliding ball and an axial bearing surface allows to shed light on how to reduce friction and wear in bearings under slippage conditions. To study the interface, the contact was investigated applying micro-pin-on-disk tests without grease or oil lubrication. As pins sapphire half-balls and 100Cr6 steel bearing balls were used. As counterpart unused 100Cr6 steel (German standard corresponding to AISI52100) axial bearing surfaces were applied. It could be shown, that with the formation of surface layers, the frictional force was reduced. This effect is lower in case of a chemical inert sphere as contact partner. The transition from friction to stiction for varied Hertzian stress was observed. The spheres on the micro-pin-on-disk tester measured the frictional properties of the surface without ploughing effects. The micro-pin-on-disk tests allow to have a closer look on the start behavior of a metallic and sapphire test specimen on an axial bearing washer under ambient conditions.

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“…It was observed, that in case of unlubricated contacts, oxide films reduce the friction [6,[14][15][16]. The surface hardness of the contact partners also influence friction and wear [17]. Additionally, the surface cleanliness, sliding speed, and temperature are of importance [13].…”

Section: Introductionmentioning

confidence: 99%

Examination of friction and wear of a 100Cr6 ball against a bearing ring in a micro-pin-on-disk tester

Bader

Pape

Gatzen

et al. 2015

Surface and Contact Mechanics Including Tribology XII

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Understanding the wear and friction phenomena in bearings is of key importance for the reduction of friction and wear. Boundary layers formed by oil additives during operation may significantly influence the frictional behaviour. To investigate the behaviour of such layers standardised test runs with cylindrical roller thrust bearings were conducted using differing oils with varying additivation. For these tests a FE-8 test rig for characterisation of rolling contact bearing lubricants was applied. As oil a low reverence and high reverence oil, as well as differently additivated oils were used. These oils may result in different boundary layers on the wear tracks. To analyse the frictional behaviour of these layers on the bearing surface, a micro-pin-on-disk tester was used under very low load. The contact of a spherical pin (made of 100Cr6) on a bearing disk (also called washer) without lubrication was examined. As a counterpart the bearing disks were used after the run in a bearing test rig under various oils, unused, and etched on the surface. Before application on the micro-pin-on-disk tester, all adhesive oil was removed. During the tests the coefficient of friction was monitored. The tests were performed at a rotational velocity of 1 min -1 , the load was 27 mN. Keywords: 100Cr6 bearing steel, thrust bearing disk, polymer transfer films, micro-pin-on-disk tester.

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Influence of hardness of the harder body on wear regime transition in a sliding pair of steels

Cited by 76 publications

References 36 publications

Effect of the Sliding Velocity on the Size and Amount of Airborne Wear Particles Generated from Dry Sliding Wheel–Rail Contacts

Effect of the Sliding Velocity on the Size and Amount of Airborne Wear Particles Generated from Dry Sliding Wheel–Rail Contacts

Micro Tribological Investigations on Dry Sliding Friction of 100Cr6 Axial Bearing Surfaces

Examination of friction and wear of a 100Cr6 ball against a bearing ring in a micro-pin-on-disk tester

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