The tribology of Ag/MoS2-based self-lubricating laser claddings for high temperature forming of aluminium alloysShow others and affiliations
2020 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 442-443, article id 203110Article in journal (Refereed) Published
Abstract [en]
In recent years, the use of aluminium alloys in the automotive industry has gained significant attention due to their specific strength, corrosion resistance and recyclability. However, their forming at high temperature in processes like hot stamping is challenging due to the poor tribological behaviour of aluminium alloys, which is the source of severe adhesive wear and a poor surface quality of the finished product.
In an effort to overcome these tribological problems, iron- and nickel-based self-lubricating laser claddings with the addition of solid lubricants such as silver and molybdenum disulfide have been evaluated under conditions representative of hot stamping against the aluminium alloy AA6082. It has been found that self-lubricating claddings decrease friction and counter body wear at high temperatures compared to alloys commonly used in forming tools such as grade 1.2367 steel. Furthermore, nickel-based self-lubricating claddings have shown a better tribological behaviour than their iron-based counterparts, due to the formation of a nickel-based sulfide layer on the counter body. It is thus expected that the implementation of self-lubricating claddings can improve the quality of the final product while reducing the need for added lubricant during the hot stamping of aluminium alloys.
Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 442-443, article id 203110
Keywords [en]
High temperature, Laser cladding, Self-lubrication, Aluminium, Hot stamping
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-76959DOI: 10.1016/j.wear.2019.203110ISI: 000513000400003Scopus ID: 2-s2.0-85075403269OAI: oai:DiVA.org:ltu-76959DiVA, id: diva2:1374197
Note
Validerad;2020;Nivå 2;2020-01-27 (johcin)
2019-11-292019-11-292024-08-15Bibliographically approved