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Assessment of the factors influencing micropitting in rolling/sliding contacts

Lookup NU author(s): Dr Adrian OilaORCiD, 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.

Publication metadata

Author(s): Oila A, Bull SJ

Publication type: Article

Publication status: Published

Journal: Wear

Year: 2005

Volume: 258

Issue: 10

Pages: 1510-1524

Print publication date: 01/05/2005

ISSN (print): 0043-1648

ISSN (electronic): 1873-2577

Publisher: Elsevier BV


DOI: 10.1016/j.wear.2004.10.012


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