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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 145

A Study of Surface Evolution at the Wheel-Rail Interface

B.T. Battaglia, A. Athukoralalage and D.V. De Pellegrin

School of Chemistry, Process & Mechanical Engineering, Queensland University of Technology, Brisbane, Australia

Full Bibliographic Reference for this paper
B.T. Battaglia, A. Athukoralalage, D.V. De Pellegrin, "A Study of Surface Evolution at the Wheel-Rail Interface", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 145, 2016. doi:10.4203/ccp.110.145
Keywords: surface evolution, roughness, twin-disc, rail, saturation, replication.

Summary
This paper traces the surface evolution at the wheel-rail interface using data obtained from a twin-disc testing machine and the surface replication technique. Changes in the surface profile of the rail testing disc are explicitly analysed according to the wear mechanism, which helps elaborate a better understanding of the attrition of asperities during the wearing-in process of surface modification. The surface profile amplitude was seen to decrease during the initial running-in phase of the experiment cycle, and after reaching a saturation value, the profile amplitude then increased. Ultimately the results show that grinding will roughen the rail surface and the wheel-rail contact conditions will then remove this surface damage to some saturation value of the profile height. The variation in the rail surface profile beyond this point is then only dependant on the contact conditions which exist between the wheel and rail during normal operation.

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