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Abstract

Salient features are described of a two-disc machine and its use to monitor friction, resistance drop count rate, surface roughness and disc bulk temperature in scuffing tests on mineral oil lubricated, case-hardened En 36A steel. Tests with two different load sequences and three oil supply temperatures are reported. Results for two extreme-pressure-additive oils are compared with earlier results for a non-additive oil and shown to support the validity of a recent hypothetical model by Baglin for the onset of microelastohydrodynamic lubrication.

Compared to the non-additive oil, the additive oils gave higher disc bulk temperature rises, greater running-in and more severe conditions at scuffing when tested at sliding and rolling speeds of 6 m/s. Nevertheless, these scuffing conditions were not so severe as those for the non-additive oil tested at a sliding speed of 3 m/s and a rolling speed of 4.5 m/s.

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References

Cann

P. M. E.

Johnston

G. J.

Spikes

H. A.

The formation of thick films by phosphorus-based anti-wear additives. Proceedings of IMechE Conference on Tribilogy, friction, lubrication and wear—fifty years on, 1987, Vol. I, pp. 543–554 (Mechanical Engineering Publications, London).

Snidle

R. W.

Rossides

S. D.

Dyson

The failure of elas-tohydrodynamic lubrication. Proc. R. Soc. Lond., 1984, Ser. A., 395, 291–311.

Baglin

K. P.

Finnis

M. P.

Kelly

D. A.

Williams

P. A.

Mixed and micro-elastohydrodynamic lubrication and the dependence on operating conditions. Proceedings of IMechE Conference on Tribology, friction, lubrication and wear—fifty years on, 1987, Vol. I, pp. 61–70 (Mechanical Engineering Publications, London).

Dyson

The failure of elastohydrodynamic lubrication of circumferentially ground discs. Proc. Instn Mech. Engrs, 1976, 190, 699–711.

Story

D. L.

Archard

J. F.

Baglin

K. P.

A reassessment of scuffing failure data of discs. Symposium on Performance and testing of gear oils and transmission fluids, 1980, pp. 109–123 (Institute of Petroleum, London).

De Gruchie

V. J.

Harrison

P. W.

Development of an edge-type disc machine and preliminary studies of various gear material-lubricant combinations. Convention on Lubrication and wear, 1963, pp. 160–180 and 371 (Institution of Mechanical Engineers, London).

Alliston-Greiner

A. F.

Greenwood

J. A.

Cameron

Thickness measurements and mechanical properties of reaction films formed by zinc dialkyldithiophosphate during running. Proceedings of IMechE Conference Tribology, friction, lubrication and wear—fifty years on, 1987, Vol. I, pp. 565–672 Mechanical Engineering Publications, London).

Crook

A. W.

Shotter

B. A.

Some scuffing experiments in a disc machine. Conference on Lubrication and wear, 1957, pp. 205–210 (Institution of Mechanical Engineers, London).

Fein

R. S.

Operating procedure effects on critical temperatures. Trans ASLE, 1967, 10, 373–385.

10.

Baglin

K. P.

Elastohydrodynamic pressure rippling in cylinders finished with a circumferential lay. Proc. Instn Mech. Engrs, Part C 1986, 200 (C5), 335–347.

11.

Baglin

K. P.

Micro-elastohydrodynamic lubrication and its relationship with running-in. Proc. Instn Mech. Engrs, Part C, 1986, 200(C6) 415–424.

12.

Dorinson

Ludema

K. C.

Mechanics and chemistry in lubrication, 1985, 242–244 (Elsevier).

History Dependence in Two-Disc Scuffing Tests

Abstract

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