Pin-on-disc study of the effects of railway friction modifiers on airborne wear particles from wheel–rail contacts |
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| Affiliation: | 1. The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China;2. Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China;1. Section of Road and Railway Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628, CN, Delft, the Netherlands;2. University of Twente, Laboratory of Surface Technology and Tribology, PO Box 217, 7500, AE, Enschede, the Netherlands;3. Department of Materials Science and Engineering, Delft University of Technology, Delft, the Netherlands;1. Brembo S.p.A., Bergamo, Italy;2. Dept. of Machine Design, KTH Royal Institute of Technology, Stockholm, Sweden;3. Dept. of Industrial Engineering, University of Trento, Trento, Italy;1. National University of Colombia, Tribology and Surfaces Group, 75th Street 79A-5, Building M17, Medellín, Colombia;2. Delft University of Technology Faculty of Civil Engineering and Geosciences, Railway Engineering, Stevinweg 1, 2628CN Delft, The Netherlands |
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| Abstract: | Knowledge of wheel–rail interaction is crucial to wheel and rail maintenance. In this interaction, some of the worn-off material is transformed into airborne particles. Although such wear is well understood, few studies treat the particles generated. We investigated friction modifiers' effects on airborne particle characteristics generated in wheel–rail contacts in laboratory conditions. Pin-on-disc machine testing with a round-head pin loaded by a dead weight load 40 N simulated maximum contact pressure over 550 MPa. Airborne particle characteristics were investigated in dry contacts and in ones lubricated with biodegradable rail grease and water- and oil-based friction modifiers. The number of particles declined with the grease; the number of ultrafine particles increased with the water-based friction modifier, mainly due to water vaporization. |
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