Friction and wear under boundary lubrication

Lunn, B.

doi:10.1016/0043-1648(57)90266-1

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…Earlier workers have also reported a similar trend after studying the effect of sliding velocity on the wear rate of metals and alloys (Pathak et al 1986;Mohan et al 1989). It has been explained that lead acts as a solid lubricant between the mating surfaces by smearing over the substract and forming a lead film (Lun 1957). In the present case also the hard and strong matrix of A1-4.5Cu alloy, is forced deeper by the asperities present on the surfaces which causes extrusion and smearing of lead over the test pin surface as shown in figures 7 and 8.…”

Section: Wear Characteristicsmentioning

confidence: 61%

Effect of processing on microstructure and wear characteristics of an Al-4·5Cu-10Pb alloy

Pathak

Ojha

1995

Bull. Mater. Sci.

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An AI 4-5Cu 10Pb alloy was processed by spra.y forming as well as impeller mixing followed by chill casting methods. The microstructure, mechanical properties and dry sliding wear characteristics of the alloy were evaluated. The spray formed alloy showed an equiaxed grain morphology with a uniform dispersion of lead particles in the matrix phase. In contrast a cellular-dendritic morphology of the primary phase was the characteristic feature of the alloy processed by impeller mixing and chill casting method. The spray formed alloy indicated its superior mechanical properties and low wear rate particularly at higher applied load and sliding velocity. The possible reason for this behaviour is discussed in the light of microstructure of the alloy and the nature of the worn out surfaces of the wear test specimens.

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Section: Wear Characteristicsmentioning

confidence: 61%

Effect of processing on microstructure and wear characteristics of an Al-4·5Cu-10Pb alloy

Pathak

Ojha

1995

Bull. Mater. Sci.

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“…These authors re port the effects of sliding steel or Armco iron contacts on plates of thirty-nine different elemental materials, under dry conditions. He further claims (19), " . The best combinations of materials are clearly those in which little or no transfer occurs in either direction.…”

Section: Effect Of Materials On Dry and Boundary Slidingmentioning

confidence: 97%

Materials for Plain Bearings

Forrester

1964

Modern Materials

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“…A surface coated with anti-wear or extreme pressure additive would have a friction coefficient in this area. 14 Other authors 11 use a similar value. As a further check, the pin was rotated in the bush without any lubrication for a few cycles.…”

Section: Numerical Simulation For a Pin-jointmentioning

confidence: 99%

Model and experiments to determine lubricant film formation and frictional torque in aircraft landing gear pin joints

Zhu

Pugh

Dwyer-Joyce

2012

Proceedings of the Institution of Mechanical Engineers, Part J:

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Pin joints are found in many large articulating structures. They tend to be under high load and articulate slowly; so, the joints typically operate in the boundary or mixed lubrication regimes. This means that the operating torque depends on the respective proportions of liquid and solid contact between the joint mating faces. In this article, a mixed lubrication model of a grease-lubricated landing gear joint is established to determine a theoretical Stribeck curve, frictional torque and lubricant film thickness under different loads. Parameters describing pin joint working conditions, geometry, lubricant properties and pin/bush texture are used. The model can also predict the proportion of the load that is supported by contacting asperities and lubricant film. The changing proportions of these two parts indicate transformations between different lubrication regimes. Experiments on an instrumented pin joint have been carried out to compare with the predicted friction and torque performance. Theoretical calculation results show good consistency with experimental plots at high load. But under low load, the real friction between pin and bush is significantly lower than theoretical predictions.

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Friction and wear under boundary lubrication

Cited by 9 publications

References 3 publications

Effect of processing on microstructure and wear characteristics of an Al-4·5Cu-10Pb alloy

Effect of processing on microstructure and wear characteristics of an Al-4·5Cu-10Pb alloy

Materials for Plain Bearings

Model and experiments to determine lubricant film formation and frictional torque in aircraft landing gear pin joints

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