Enhancement of laser cut edge quality of ultra-thin titanium grade 2 sheets by applying an in-process approach using modulated Yb:YAG continuous wave fiber laser

  • Titanium is used in many areas due to its excellent mechanical, biological and corrosion-resistant properties. Implants often have thin and filigree structures, providing an ideal application for fine cutting with laser. In the literature, the main focus is primarily on investigating and optimizing the parameters for titanium sheets with thicknesses greater than 1 mm. Hence, in this study, the basic manufacturing parameters of laser power, cutting speed and laser pulse of a 200 W modulated fiber laser are investigated for 0.15 mm thick grade 2 titanium sheets. A reproducible, continuous cut could be achieved using 90 W laser-power and 2 mm/s cutting-speed. Pulse pause variations between 85 and 335 μs in 50 μs steps and a fixed pulse width of 50 μs show that a minimum kerf width of 23.4 μm, as well as a minimum cut edge roughness Rz of 3.59 μm, is achieved at the lowest pulse pause duration. An increase in roughness towards the laser exit side, independent of the laser pulse pause duration, was found and discussed. The results provide initial process parameters for cutting thin titanium sheets and thus provide the basis for further investigations, such as the influence of cutting gas pressure and composition on the cut edge.

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Author:Alexander Bartsch, Moritz BurgerORCiD, Marius GradORCiD, Lukas Esper, Ulrich Schultheiß, Ulf Noster, Thomas SchratzenstallerORCiD
Parent Title (English):Discover Mechanical Engineering
Document Type:Article
Year of first Publication:2023
Publishing Institution:Ostbayerische Technische Hochschule Regensburg
Release Date:2023/10/18
Tag:Kerf; Laser cutting; Titanium sheet
Corresponding author: Alexander Bartsch
Institutes:Fakultät Maschinenbau
Technologie-Campus Parsberg-Lupburg
Fakultät Maschinenbau / Labor Medizinprodukte
Fakultät Maschinenbau / Labor Werkstoffrandschichtanalytik
OpenAccess Publikationsweg:Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium
Corresponding author der OTH Regensburg
research focus:Produktion und Systeme
Funding:Publikationsfonds der OTH Regensburg
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International