Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels
Authors: Viesca, J.L., González-Cachón, S., García, A., González, R., Bernardo-Sánchez, A. and Hernández Battez, A.
Journal: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
Volume: 235
Issue: 3
Pages: 353-360
eISSN: 2041-3017
ISSN: 0954-4097
DOI: 10.1177/0954409720925682
Abstract:In railway systems, certain atmospheric conditions – mainly related to temperature and relative humidity – lead to the creation of iron oxides which can affect the coefficient of friction between the wheel and the rail. This can result in increased wear of the rail, reducing its service life and thus increasing replacement costs. Pin-on-disc tests were conducted in a climate chamber to study the influence of environmental conditions and iron oxides on the coefficient of friction. The iron oxides generated on the surface of specimens extracted from microalloyed rail steel during wear tests were analysed using X-ray diffraction. The results show that hematite (α-Fe2O3) is the predominant iron oxide among all the oxides generated on the worn surfaces. It was further noted that the oxide layer resulting from the rise in both temperature and relative humidity does not significantly affect the average coefficient of friction for each steel samples tested. High relative humidity combined with high temperature leads to the formation of α-Fe2O3, which tends to increase the coefficient of friction. However, a boundary lubrication effect is observed at higher relative humidity due to a condensed water film, which reduces the coefficient of friction and counteracts the increase of the coefficient of friction expected due to the presence of hematite.
https://eprints.bournemouth.ac.uk/34092/
Source: Scopus
Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels
Authors: Viesca, J.L., Gonzalez-Cachon, S., Garcia, A., Gonzalez, R., Bernardo-Sanchez, A. and Hernandez Battez, A.
Journal: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
Volume: 235
Issue: 3
Pages: 353-360
eISSN: 2041-3017
ISSN: 0954-4097
DOI: 10.1177/0954409720925682
https://eprints.bournemouth.ac.uk/34092/
Source: Web of Science (Lite)
Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels
Authors: Viesca Rodriguez, J.L., González-Cachón, S., Garcia, A., Gonzalez, R., Bernardo-Sánchez, A. and Hernandez Battez, A.
Journal: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
ISSN: 0954-4097
Abstract:© IMechE 2020. In railway systems, certain atmospheric conditions – mainly related to temperature and relative humidity – lead to the creation of iron oxides which can affect the coefficient of friction between the wheel and the rail. This can result in increased wear of the rail, reducing its service life and thus increasing replacement costs. Pin-on-disc tests were conducted in a climate chamber to study the influence of environmental conditions and iron oxides on the coefficient of friction. The iron oxides generated on the surface of specimens extracted from microalloyed rail steel during wear tests were analysed using X-ray diffraction. The results show that hematite (α-Fe2O3) is the predominant iron oxide among all the oxides generated on the worn surfaces. It was further noted that the oxide layer resulting from the rise in both temperature and relative humidity does not significantly affect the average coefficient of friction for each steel samples tested. High relative humidity combined with high temperature leads to the formation of α-Fe2O3, which tends to increase the coefficient of friction. However, a boundary lubrication effect is observed at higher relative humidity due to a condensed water film, which reduces the coefficient of friction and counteracts the increase of the coefficient of friction expected due to the presence of hematite.
https://eprints.bournemouth.ac.uk/34092/
Source: BURO EPrints