Influence of texturing parameters and contact conditions on tribological behaviour of laser textured surfaces

Introducing specific textures on a tribological surface can contribute to friction reduction in sliding contacts. Well defined micro-dimples can act as lubricant reservoirs capable of feeding lubricant directly into the contact and initiating micro elasto-hydrodynamic lubrication, as well as traps f...

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Bibliographic Details
Published in:Meccanica (Milan) 2011-06, Vol.46 (3), p.567-575
Main Authors: Vilhena, L. M., Podgornik, B., Vižintin, J., Možina, J.
Format: Article
Language:English
Subjects:
Asperity Contacts & Lubrication Aspects
Automotive Engineering
Civil Engineering
Classical Mechanics
Contact
Feeding
Lubricants
Lubrication
Mechanical Engineering
Physics
Physics and Astronomy
Surface layer
Texture
Texturing
Tribology
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Summary:Introducing specific textures on a tribological surface can contribute to friction reduction in sliding contacts. Well defined micro-dimples can act as lubricant reservoirs capable of feeding lubricant directly into the contact and initiating micro elasto-hydrodynamic lubrication, as well as traps for wear debris. A lot of experimental work has been already carried out, but it is mostly based on trial and error approach when defining optimum textures for a given application. A comparison was made between the performance of a reference non-textured surface and laser surface texturing (LST) discs with three different dimple depths. It was found that tribological behaviour depends on the depth of the micro-dimples as well as on the dominant lubrication mode (operating conditions). The beneficial effect of micro-dimples becomes larger with an increase in dimple depth as well as for higher sliding speeds.
ISSN:0025-6455
1572-9648
DOI:10.1007/s11012-010-9316-x