Influence of temporal pulse-shaping on laser surface texturing of metals using fast modulated cw-fiber laser radiation

  • Remote ablation cutting with continuous wave laser radiation is a process commonly used for the surface pretreatment of large area metallic parts before joining of metal-polymer hybrid structures, due to their cost-effectiveness and high average powers when compared to short-pulsed lasers. The process requires high power-densities and multiple irradiations at high scanning speeds to achieve the desired kerf depth. In this work a fast modulated cw fiber laser is used to investigate the possibilities of increasing the material removal rate by periodically dropping the laser power and therefore modifying the recoil pressure at the vapor-liquid interface in the interaction zone to assist in melt expulsion. It was found that power modulation with frequencies in excess of 10 kHz can lead to an increased material removal rate when compared to continuous wave processing at comparable average and peak power levels, enabling higher kerf aspect ratios in a single irradiation.

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Metadaten
Author:Andreas Schkutow, Thomas Frick
DOI:https://doi.org/10.1016/j.procir.2022.08.077
ISSN:2212-8271
Parent Title (English):Procedia CIRP
Publisher:Elsevier BV
Document Type:Article
Language:English
Reviewed:Begutachtet/Reviewed
Release Date:2024/07/01
Tag:metal-polymer hybrid structures surface structuring remote ablation cutting fast-modulated continous wave laser radiation
Volume:111
Pagenumber:4
First Page:732
Last Page:735
institutes:Fakultät Maschinenbau und Versorgungstechnik
Institut für Chemie, Material- und Produktentwicklung
Research Themes:Materialien & Produktionstechnik
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