The objective of this study was to investigate the influence of contaminants on the tribological behavior of wheel–rail contact. Sand, phosphate, sulfur, and cement were the studied contaminants identified after a Tunisian railway expertise. All friction tests under different contaminants were conducted using pin-on-disk machine, maintaining the same sliding velocity and Hertzian pressure, respectively, at 0.1 m/s and 1000 MPa. All results were compared with reference of two configuration contacts: wheel tread-rail head (clean dry condition) and wheel flange-rail gauge (clean lubricated condition). The main findings of this study could be listed as follows. First, with reference to clean and dry condition tests, sand and cement showed a higher adhesion than phosphate and sulfur. Second, all contaminants increased the adhesion coefficient with reference to clean and lubricated conditions. Third, sulfur generated the lowest energy-wear coefficient yielding a mild wear. Fourth, sand, cement, and phosphate generated a higher energy-wear coefficient yielding an abrasive wear. Finally, the highest energy-wear coefficient was obtained with sand.
Tribological Behavior of Wheel–Rail Contact Under Different Contaminants Using Pin-On-Disk Methodology
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received October 23, 2015; final manuscript received January 20, 2016; published online July 20, 2016. Assoc. Editor: George K. Nikas.
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Khalladi, A., and Elleuch, K. (July 20, 2016). "Tribological Behavior of Wheel–Rail Contact Under Different Contaminants Using Pin-On-Disk Methodology." ASME. J. Tribol. January 2017; 139(1): 011102. https://doi.org/10.1115/1.4033051
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