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Open AccessArticle

Production and Tribological Characterization of Tailored Laser-Induced Surface 3D Microtextures

1
V-Research GmbH, Stadtstrasse 33, 6850 Dornbirn, Austria
2
Research Center for Microtechnology, Vorarlberg University of Applied Sciences, Hochschulstrasse 1, 6850 Dornbirn, Austria
*
Authors to whom correspondence should be addressed.
Lubricants 2019, 7(8), 67; https://doi.org/10.3390/lubricants7080067
Received: 28 June 2019 / Revised: 31 July 2019 / Accepted: 1 August 2019 / Published: 6 August 2019
The aim of the present study was firstly to determine the manufacturing feasibility of a specific surface 3D-microtexturing on steel through an ultra-short pulsed laser, and secondly to investigate the tribological properties under 2 different lubrication conditions: oil-lubricated and antifriction coated. The selected 3D-microtexture consisted of 2 different levels of quadratic micropillars having side dimensions of approximately 45 µm, heights of about 35 µm and periods of 80 µm. It was shown that the production of specific 3D-microtextures on steel substrates using an ultra-short pulsed laser was feasible, and that the reproducibility of the texture dimensions over the entire textured region was extremely good. Frictional investigations have shown that, in comparison to the benchmark (untextured samples), the 3D-microtextured samples do not induce any significant improvements in the coefficient of friction (COF) under oil-lubricated conditions, but that under antifriction coated conditions, significant improvements in the friction coefficients may be achieved. Wear-based tribological tests have shown that the antifriction coating on benchmark samples was completely depleted, which greatly influenced their friction and wear behavior, since steel-steel contact occurred during testing. For the 3D-microtexture, the antifriction coating was also partially depleted; however, it accumulated itself in the microtexture which acted as a potential lubricant reservoir. View Full-Text
Keywords: laser microtexturing; ultra-short pulsed laser; surface characterization; tribological characterization; friction; wear laser microtexturing; ultra-short pulsed laser; surface characterization; tribological characterization; friction; wear
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MDPI and ACS Style

Voyer, J.; Zehetner, J.; Klien, S.; Ausserer, F.; Velkavrh, I. Production and Tribological Characterization of Tailored Laser-Induced Surface 3D Microtextures. Lubricants 2019, 7, 67.

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