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Power Spectral Density evaluation of laser milled surfaces

Lorbeer, Raoul-Amadeus and Pastow, Jan and Sawannia, Michael and Klinkenberg, Peter and Förster, Daniel Johannes and Eckel, Hans-Albert (2017) Power Spectral Density evaluation of laser milled surfaces. Materials. Multidisciplinary Digital Publishing Institute (MDPI). ISSN 1996-1944.

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Ablating surfaces with a pulsed laser system in milling processes often leads to surface changes depending on the milling depth. Especially if a constant surface roughness and evenness is essential to the process, structural degradation may advance until the process fails. The process investigated is the generation of precise thrust by laser ablation. Here, it is essential to predict or rather control the evolution of the surfaces roughness. Laser ablative milling with a short pulse laser system in vacuum (~1 Pa) were performed over depths of several 10 µm documenting the evolution of surface roughness and unevenness with a white light interference microscope. Power spectral density analysis of the generated surface data reveals a strong influence of the crystalline structure of the solid. Furthermore, it was possible to demonstrate that this effect could be suppressed for gold.

Item URL in elib:https://elib.dlr.de/117801/
Document Type:Article
Title:Power Spectral Density evaluation of laser milled surfaces
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lorbeer, Raoul-Amadeusraoul.lorbeer (at) dlr.deUNSPECIFIED
Klinkenberg, PeterDLRUNSPECIFIED
Förster, Daniel Johannesdaniel.foerster (at) ifsw.uni-stuttgart.deUNSPECIFIED
Eckel, Hans-AlbertHans-Albert.Eckel (at) dlr.deUNSPECIFIED
Journal or Publication Title:Materials
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:surface roughness; surface unevenness; laser milling; power spectral density; micro crystalline; Hall-Petch; EBSD
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Mikroantriebe (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics > Studies and Concepts
Deposited By: Lorbeer, Raoul-Amadeus
Deposited On:08 Jan 2018 10:08
Last Modified:24 Jan 2020 11:15

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