Wear Particle Analysis and the Evolution of the Plastically Deformed Layer on Australian Rail Steel

Abstract:

Particle analysis methodology is presented, together with the morphology of the wear debris formed during rolling contact fatigue. Wear particles are characterised by their surface topography and in terms of wear mechanism. Rail-wheel materials are subjected to severe plastic deformation as the contact loading progresses, which contributes to a mechanism of major damage in head-hardened rail steel. Most of the current methodologies involve sectioning of the rail-wheel discs to trace material damage phenomena such as crack propagation and plastic strain accumulation. This paper proposes methodology to analyse the development of the plastically deformed layer by sectioning wear particles using the focussed ion beam (FIB) milling method. Moreover, it highlights the processes of oxidation and rail surface delamination during unlubricated rolling contact fatigue.

• Periodical: Applied Mechanics and Materials (Volume 846)
• Pages: 577-582
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.846.577
• Online since: July 2016
• Authors: Asitha C. Athukorala*, Dennis V. de Pellegrin, Ben T. Battaglia, Kyriakos I. Kourousis
• Keywords: FIB Milling, Hardness, Railway, Rolling Contact Fatigue, Wear Particle

References

[1] S. Pal, W.J. Daniel, C.H. Valente, A. Wilson, and A. Atrens, Surface damage on new AS60 rail caused by wheel slip. Engineering Failure Analysis, 2012. 22: pp.152-165.

DOI: 10.1016/j.engfailanal.2012.01.002

[2] R.I. Carroll and J.H. Beynon, Rolling contact fatigue of white etching layer: Part 1. Crack morphology. Wear, 2007. 262(9-10): pp.1253-1266.

DOI: 10.1016/j.wear.2007.01.003

[3] L. Wang, A. Pyzalla, W. Stadlbauer, and E.A. Werner, Microstructure features on rolling surfaces of railway rails subjected to heavy loading. Materials Science and Engineering: A, 2003. 359(1–2): pp.31-43.

DOI: 10.1016/s0921-5093(03)00327-7

[4] S.L. Grassie, Studs and Squats: the evolving story, in 10th International Conference on Contact Mechanics, CM2015, Colorado Springs, Colorado, USA2015.

[5] S. Pal, W.J.T. Daniel, and M. Farjoo, Early stages of rail squat formation and the role of a white etching layer. International Journal of Fatigue, 2013. 52: pp.144-156.

DOI: 10.1016/j.ijfatigue.2013.02.016

[6] Y.M. Makoto ISHIDA, Detection of White Etching Layer Causing Rail Defects, in 10th International Conference on Contact Mechanics, CM2015, Colorado Springs, Colorado, USA2015: Colorado Springs, Colorado, USA.

DOI: 10.3133/gf203

[7] G.M. C. Bernsteiner, A. Meierhofer, K. Six, D. Künstner, P. Dietmaier, Development of White Etching Layers on Rails: Simulations and Experiments, in 10th International Conference on Contact Mechanics, CM2015, Colorado Springs, Colorado, USA2015.

DOI: 10.1016/j.wear.2016.03.028