Kempka, R., Falconer, R., Gutsulyak, D. et al. (1 more author) (2021) Effects of oxide and water on friction of rail steel – new test method and friction mapping. Tribology: Materials, Surfaces and Interfaces, 15 (2). pp. 80-91. ISSN 1751-5831
Abstract
A novel tribo-testing method using a pin-on-plate tribometer was developed to test and visualise the coefficient of friction over surfaces with oxides present to examine low adhesion issues. Tribo-test data was recorded each pass over test surfaces showing how friction changes with mechanical action. Trackside environmental monitoring and railhead swabbing was performed to investigate the physical and chemical environment of the railhead. Iron oxides were both synthesised on and deposited on rail steel substrates to simulate “wet-rail” conditions. Powdered oxide layers of magnetite, haematite, goethite and lepidocrocite were deposited on rail steel substrates to investigate individual oxides. Composition was analysed using x-ray diffraction and scanning electron microscopy before testing. Magnetite, Haematite and Lepidocrocite were formed when water alone was applied to the surfaces. Low friction was observed on oxidised sample surfaces only outside high roughness, oxide pitted, areas, but these conditions were shown to be difficult to achieve and transient.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2020 Institute of Materials, Minerals and Mining and Informa UK Limited, trading as Taylor & Francis Group. This is an author-produced version of a paper subsequently published in Tribology: Materials, Surfaces and Interfaces. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | friction; low adhesion; railhead contamination; iron oxides; wheel / rail contact; wet rail; x-ray diffraction; iron oxyhydroxides |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 05 May 2020 09:59 |
Last Modified: | 23 Nov 2021 11:33 |
Status: | Published |
Publisher: | Taylor & Francis |
Refereed: | Yes |
Identification Number: | 10.1080/17515831.2020.1765611 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:160212 |