Please use this identifier to cite or link to this item: doi:10.22028/D291-27508
Title: Laser Surface Texturing of TiAl Multilayer Films—Effects of Microstructure and Topography on Friction and Wear
Author(s): Gachot, Carsten
Grützmacher, Philipp
Rosenkranz, Andreas
Language: English
Title: Lubricants
Volume: 6
Issue: 2
Publisher/Platform: MDPI
Year of Publication: 2018
Free key words: laser surface texturing
dry friction
DDC notations: 600 Technology
Publikation type: Journal Article
Abstract: Laser surface texturing is an efficient way to control the friction and wear properties of materials. Although described in many papers, most previous work relates to a pure topographic view of laser-textured surfaces. As lasers are heat sources, their thermal impact during treatment can be high enough to modify the material’s microstructure or surface chemistry and affect tribological properties as well. This research took a closer look at the microstructure of laser-textured TiAl multilayers, besides topographic aspects. Direct laser interference patterning was used to create well-defined line-like surface textures in TiAl multilayers with differing lateral feature sizes in the micron range. High-resolution techniques such as TEM and XRD highlighted the effect of this method on microstructure, and in particular, the phase situation of the TiAl multilayer. Thermal simulations demonstrated that the maximum achievable temperatures were around 2000 K, thus being high enough to melt Ti and Al. Cooling rates on the order of 109 K/s depended on the lateral feature size, potentially leading to metastable microstructures. Finally, ball-on-disk tests on as-textured TiAl specimens showed a reduction in wear under dry conditions depending on the periodicity of the line-like textures used.
DOI of the first publication: 10.3390/lubricants6020036
Link to this record: urn:nbn:de:bsz:291--ds-275080
ISSN: 2075-4442
Date of registration: 20-Feb-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Frank Mücklich
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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