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Effect of temperature and atmosphere on fretting wear of self-mated Fe-10Cr-4Al alloy for nuclear power application
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-5593-1908
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-3123-0303
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1454-1118
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-1162-4671
2025 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 564-565, article id 205704Article in journal (Refereed) Published
Abstract [en]

Over the years, fretting has been a leading cause of fuel failures for water cooled nuclear reactors. Implementation of liquid lead coolant increases the need for fretting and corrosion-resistant materials. Fe–10Cr–4Al alloy has shown good resistance to thermal aging, oxidation, liquid metal corrosion, and embrittlement in liquid lead environment. The performance of Fe-10Cr-4Al under fretting wear conditions has not been studied previously. This work aims to investigate the fretting wear and friction behaviour of self-mated Fe-10Cr-4Al alloy at varying temperatures, in the presence of a reducing gas environment and liquid lead. The results show that an increase in test temperature from RT to 550 °C decreases the coefficient of friction and promotes the formation of Cr and Fe oxide third body layer. At high temperature in reducing gas atmosphere, the initial plastic deformation and severe adhesion leads to early seizure. Presence of liquid lead has a lubricating effect and allows a third body layer to form on worn surfaces. A detailed description of the initial wear mechanisms of Fe-10Cr-4Al alloy and friction levels under various conditions provides a base for further investigation of this alloy for long-duration fretting wear.

 

Place, publisher, year, edition, pages
Elsevier, 2025. Vol. 564-565, article id 205704
Keywords [en]
Wear, Friction, High temperature fretting, Liquid lead
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Metallurgy and Metallic Materials
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-111161DOI: 10.1016/j.wear.2024.205704Scopus ID: 2-s2.0-85212156825OAI: oai:DiVA.org:ltu-111161DiVA, id: diva2:1925420
Funder
Swedish Foundation for Strategic Research, ARC19-0043
Note

Validerad;2025;Nivå 2;2025-01-08 (signyg);

Fulltext license: CC BY

Available from: 2025-01-08 Created: 2025-01-08 Last updated: 2025-01-08Bibliographically approved

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Kolbas, D.Pelcastre, L.Prakash, B.Hardell, J.

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