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Ultra-low friction on 100cr6-steel surfaces after direct laser interference patterning

: Bieda, M.; Schmädicke, C.; Roch, T.; Lasagni, A.


Advanced engineering materials 17 (2015), No.1, pp.102-108
ISSN: 1438-1656
ISSN: 1615-7508
Journal Article
Fraunhofer IWS ()

This study discusses the effects of surface topographies on the frictional behavior of 100Cr6 bearing steel. A solid state laser with nanosecond pulses is used to produce one- and two-dimensional periodic micropatterns using direct laser interference patterning. Line-, cross-, and dot-like patterns with pitches of 5m, and aspect ratios (AR) between 0.02 and 0.17 are fabricated. The friction tests of the surface textured samples are performed under lubricating conditions using a ball-on-disk configuration in rotating mode. The results show that through the surface structure a reduction of the friction coefficient from 25 to 65% can be achieved compared to unstructured surfaces. The smallest coefficients of friction are obtained for ARs between 0.07 and 0.11.