TU Darmstadt / ULB / TUprints

Avoiding Starvation in Tribocontact Through Active Lubricant Transport in Laser Textured Surfaces

Stark, Tobias ; Kiedrowski, Thomas ; Marschall, Holger ; Lasagni, Andrés Fabián (2023)
Avoiding Starvation in Tribocontact Through Active Lubricant Transport in Laser Textured Surfaces.
In: Lubricants, 2019, 7 (6)
doi: 10.26083/tuprints-00017168
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

Download (64MB) | Preview
Item Type: Article
Type of entry: Secondary publication
Title: Avoiding Starvation in Tribocontact Through Active Lubricant Transport in Laser Textured Surfaces
Language: English
Date: 20 November 2023
Place of Publication: Darmstadt
Year of primary publication: 2019
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Lubricants
Volume of the journal: 7
Issue Number: 6
Collation: 18 Seiten
DOI: 10.26083/tuprints-00017168
Corresponding Links:
Origin: Secondary publication DeepGreen

Laser texturing is a viable tool to enhance the tribological performance of surfaces. Especially textures created with Direct Laser Interference Patterning (DLIP) show outstanding improvement in terms of reduction of coefficient of friction (COF) as well as the extension of oil film lifetime. However, since DLIP textures have a limited depth, they can be quickly damaged, especially within the tribocontact area, where wear occurs. This study aims at elucidating the fluid dynamical behavior of the lubricant in the surroundings of the tribocontact where channel-like surface textures are left after the abrasion wear inside the tribocontact area. In a first step, numerical investigations of lubricant wetting phenomena are performed applying OpenFOAM®. The results show that narrow channels (width of 10 μm) allow higher spreading than wide channels (width of 30 μm). In a second step, fluid transport inside DLIP textures is investigated experimentally. The results show an anisotropic spreading with the spreading velocity dependent on the period and depth of the laser textures. A mechanism is introduced for how lubricant can be transported out of the channels into the tribocontact. The main conclusion of this study is that active lubricant transport in laser textured surfaces can avoid starvation in the tribocontact.

Uncontrolled Keywords: stribeck curve, lubricant transport, laser surface texturing, direct laser interference patterning, phase-field method
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-171687
Additional Information:

This article belongs to the Special Issue Laser-Induced Periodic Surface Nano- and Microstructures for Tribological Applications

Classification DDC: 500 Science and mathematics > 510 Mathematics
600 Technology, medicine, applied sciences > 600 Technology
Divisions: 04 Department of Mathematics > Analysis > Mathematical Modeling and Analysis
Date Deposited: 20 Nov 2023 10:00
Last Modified: 27 Nov 2023 09:07
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/17168
PPN: 513476164
Actions (login required)
View Item View Item