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Wear behavior of micro-coined steel surfaces under mixed lubrication
Pontifical Catholic University of Chile.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
Imperial College London.
Number of Authors: 4
2016 (English)In: Industrial Lubrication and Tribology, ISSN 0036-8792, E-ISSN 1758-5775Article in journal (Refereed) In press
Abstract [en]

Hemispherical structures with different area densities (20 and 30 %), depths (50 and 100 µm) and diameters (100 and 200 µm) were fabricated by hot micro-coining on stainless steel samples. The wear performance of these samples was studied using a ball-on-disk tribometer in rotational sliding mode using a normal load of 30 N and a fixed sliding velocity of 2 cm/s. Two different Poly-(alpha)-olefin oils without any additive having a kinematic viscosity of 4 and 40 cSt, respectively, were used to study the influence of the oil viscosity on the wear behavior. Concerning the polished reference, an enlarged wear volume with an increase in the cycle number and oil viscosity was observed. In the case of the micro-coined surfaces, all samples demonstrate a pronounced reduction in the wear volume (up to a factor of 100 for PAO 40) compared to the polished reference irrespective of the oil viscosity used.

Place, publisher, year, edition, pages
Germany, 2016.
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
URN: urn:nbn:se:ltu:diva-60164OAI: diva2:1044859
Available from: 2016-11-07 Created: 2016-11-07 Last updated: 2016-12-03

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Khan, Saad Ahmed Khan
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