Effect of different surface profile on wear of rail steel (AS1085.1) used in Australian heavy-haul railways

Athukorala, Asitha, De Pellegrin, Dennis, & Wickramasinghe, Isuru Udara (2015) Effect of different surface profile on wear of rail steel (AS1085.1) used in Australian heavy-haul railways. International Journal of Materials Engineering Innovation, 6(4), pp. 225-242.

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Abstract

The extreme diversity of conditions acting on railways necessitates a variety of experimental approaches to study the critical wear mechanisms that present themselves at the contact interface. This work investigates the effects of contact pressure and geometry in rolling-contact wear tests by using discs with different radii of curvature to simulate the varying contact conditions that may be typically found in the field. It is commonly adapted to line contact interface as it has constant contact pressure. But practical scenario of the rail wheel interface, the contact area increase and contact pressure change as tracks worn off.

The tests were conducted without any significant amount of traction, but micro slip was still observed due to contact deformation. Moreover, variation of contact pressure was observed due to contact patch elongation and diameter reduction. Rolling contact fatigue, adhesive and sliding wear were observed on the curved contact interface. The development of different wear regimes and material removal phenomena were analysed using microscopic images in order to broaden the understanding of the wear mechanisms occurring in the rail-wheel contact.

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ID Code: 86488
Item Type: Journal Article
Refereed: Yes
Keywords: rolling-contact, twin-disc, hardened rail, wear rate
ISSN: 1757-2754
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Tribology (091309)
Australian and New Zealand Standard Research Classification > COMMERCE MANAGEMENT TOURISM AND SERVICES (150000) > TRANSPORTATION AND FREIGHT SERVICES (150700) > Rail Transportation and Freight Services (150702)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute for Future Environments
Copyright Owner: Copyright 2015 InderScience Publishers
Deposited On: 10 Aug 2015 03:13
Last Modified: 01 May 2016 14:01

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