Analysis of the Tribological Behaviour of Stainless and Ball Bearing Steels Sliding in the Presence of Sulphur Extreme-Pressure Additives


Conventional wear tests using a Four-Ball Lubricant Tester with the British Standard SAE 52100 steel were supplemented by tests with a stainless steel (AISI 420). Four combinations of these two materials were studied, namely each material was used in turn for the upper (driven) ball and the lower (clamped) balls. The tribological behaviour of stainless and ball bearing steel were studied under extreme pressure and/or anti-wear lubrication conditions in the presence of sulphur and sulphur containing additives, in order to compare the wear behaviour of the AISI 420 stainless steel with the SAE 52100 steel, taking into account the influence of chromium in both materials. Electron Probe Microanalysis and Glancing Angle X-ray Diffraction combined with Scanning Electron Microscopy have been used to identify the thin films produced on the worn surfaces and to study the micro- Structures of the subsurface layers. This investigation shows that the wear behaviour of a combination of materials is worsened by the greater use of the stainless steel in the rotating and stationary balls. The percentage of chromium does have a deleterious effect on the wear behaviour of the AISI 420 stainless steel, where the anti wear and extreme pressure actions were suppressed. These effects were 3 investigated using surface analytical techniques by using the same and mixed specimens.

Divisions: Aston University (General)
Additional Information: Copyright © Dawud, 1985. S.J. Dawud asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately.
Institution: Aston University
Uncontrolled Keywords: tribological behaviour,steels,anti-wear,additives,extreme-pressure,physical analysis
Last Modified: 08 Dec 2023 08:17
Date Deposited: 09 Dec 2010 13:21
Completed Date: 1985
Authors: Dawud, Sattar J.

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