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Tribological behaviour of MoS2-based self-lubricating laser cladding for use in high temperature applications
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements. AC2T Research GmbH.ORCID iD: 0000-0003-1542-5872
AC2T Research GmbH.
AC2T research GmbH.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1454-1118
2018 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 126, p. 153-165Article in journal (Refereed) Published
Abstract [en]

Many high temperature (HT) forming processes require the use of solid lubricants in order to control friction and reduce wear. In an attempt to eliminate the need for solid lubrication in high temperature sliding applications, nickel-based self-lubricating coatings with the addition of Ag and MoS2 were prepared by means of laser cladding on stainless steel substrates.

The behaviour of the resulting laser claddings was thoroughly evaluated up to 600 °C, including the oxidation behaviour and reciprocating tribotesting using different counter body geometries (ball and flat pin). The self-lubricating coatings showed lower friction than the unmodified reference alloy at all tested temperatures, in addition to a significant microstructural stability after prolonged exposure at high temperatures. The addition of solid lubricants to the claddings was also found to be beneficial in terms of the counter body wear at HT, as no material loss could be measured for the bearing balls after testing at 600 °C against the self-lubricating claddings, despite the significant softening experienced by AISI 52100 bearing steel at HT.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 126, p. 153-165
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-68937DOI: 10.1016/j.triboint.2018.05.015ISI: 000437075900016Scopus ID: 2-s2.0-85047212660OAI: oai:DiVA.org:ltu-68937DiVA, id: diva2:1210419
Note

Validerad;2018;Nivå 2;2018-05-28 (andbra)

Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-08-10Bibliographically approved

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Torres, HectorPrakash, Braham

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