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Lookup NU author(s): Dr Adrian Oila,
Professor Steve BullORCiD
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Micropitting is currently a significant failure mechanism in carburised steel gears, but the detailed mechanisms of crack initiation and propagation are not well understood. Experiments have been carried out using a twin disc machine, according to a factorial experimental design in order to assess the influence of seven factors: material, surface finish, lubricant, load, temperature, speed and, slide-to-roll ratio. In order to minimise time, the design adopted was a fractional factorial design 2(7~4). It has been found that load has the biggest effect on micropitting initiation whereas speed and slide-to-roll ratio have the biggest effects on micropitting propagation. Finally it is shown that micropitting is related to the phenomenon of martensite decay. © 2004 Elsevier B.V. All rights reserved.
Author(s): Oila A, Bull SJ
Publication type: Article
Publication status: Published
Print publication date: 01/05/2005
ISSN (print): 0043-1648
ISSN (electronic): 1873-2577
Publisher: Elsevier BV
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