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Embeddability behaviour of some Pb-free engine bearing materials in the presence of abrasive particles in engine oil
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-2705-9195
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1162-4671
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1454-1118
2019 (English)In: Tribology - Materials, Surfaces & Interfaces, ISSN 1751-5831, E-ISSN 1751-584X, Vol. 13, no 1, p. 39-49Article in journal (Refereed) Published
Abstract [en]

One of the tribological requirements on engine bearing material is its ability to safely embed contaminant particles onto its surface and minimise damage to both the bearing and crankshaft surfaces. In this work, a journal bearing test rig that operates under constant load has been employed to investigate the embeddability behaviour of selected multi-layered Pb-free engine bearing materials at three different rotational speeds using engine oil contaminated with SiC particles. Experimental results have shown that third-body abrasive wear is influenced by the lubricant film thickness. There was also difference in embeddability of the different materials. Bismuth-based overlay and MoS2 containing polyamide-imide-based overlay-coated materials show higher wear compared to tin-based overlay and a polyamide-imide-based composite overlay-coated material. Steel counter surfaces sliding against bismuth-based overlay and MoS2 containing polyamide-imide-based overlay exhibited higher wear than those sliding against tin-based overlay and polyamide-imide-based composite overlay. 

Place, publisher, year, edition, pages
Taylor & Francis, 2019. Vol. 13, no 1, p. 39-49
Keywords [en]
Embeddability, third-body abrasive wear, hydrodynamic lubrication, engine bearings, Pb-free
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-72774DOI: 10.1080/17515831.2019.1574452OAI: oai:DiVA.org:ltu-72774DiVA, id: diva2:1285306
Note

Validerad;2019;Nivå 2;2019-04-12 (oliekm)

Available from: 2019-02-04 Created: 2019-02-04 Last updated: 2019-04-12Bibliographically approved

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Gebretsadik, DanielHardell, JensPrakash, Braham

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