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Tribology Letters
Erschienen in: Tribology Letters 2/2013

01.11.2013 | Original Paper

Friction Between Wheel and Rail: A Pin-On-Disc Study of Environmental Conditions and Iron Oxides

verfasst von: Yi Zhu, Ulf Olofsson, Hua Chen

Erschienen in: Tribology Letters | Ausgabe 2/2013

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Abstract

The coefficient of friction between railway wheels and rails is crucial to railway operation and maintenance. Since the wheel–rail system is an open system, environmental conditions, such as humidity and temperature, affect the friction coefficient. Pin-on-disc testing was conducted to study the influence of environmental conditions and iron oxides on the coefficient of friction between the wheel and rail. The iron oxides were pre-created in a climate chamber. The surfaces of the tested samples were analysed using X-ray diffraction, scanning electron/focused ion beam microscopy, and Raman spectroscopy. Results indicate that the coefficient of friction decreases with increasing relative humidity (RH) up to a saturation level. Above this level, the coefficient of friction remains low and stable even when the RH increases. In particular, when the temperature is low, a small increase in the amount of water (i.e., absolute humidity) in the air can significantly reduce the coefficient of friction. At high humidity levels, a water molecule film can keep the generated haematite on the surfaces, counterbalancing the effect of rising humidity.
Vorheriger Artikel Fundamental Investigation of the Wear Progression of Silicon Atomic Force Microscope Probes
Nächster Artikel Friction and Vibration of Brake Friction Materials Reinforced with Chopped Glass Fibers

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Metadaten
Titel
Friction Between Wheel and Rail: A Pin-On-Disc Study of Environmental Conditions and Iron Oxides
verfasst von
Yi Zhu
Ulf Olofsson
Hua Chen
Publikationsdatum
01.11.2013
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 2/2013
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-013-0220-0

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