%0 Conference Paper %1 feuer.2019.depth %A Feuer, Anne %A Förster, Daniel J. %A Weber, Rudolf %A Graf, Thomas %B Proceedings of the Lasers in Manufacturing Conference 2019 %D 2019 %I German Scientific Laser Society (WLT e.V.) %K MicroMaterialProcessing Drilling myown Laser UltrashortPulse from:annefeuer Steel %T Depth and quality limit for percussion-drilled microholes with depth > 1 mm using ultrashort pulsed laser radiation %U https://www.wlt.de/lim/Proceedings2019/data/PDF/Contribution_349_final.pdf %X Based on the assumption that laser-drilled microholes can be approximated by a cone the maximum depth as a function of the laser fluence can be predicted by a simple analytical model. In this contribution, it will be shown, that the calculated maximum depth agrees well to microholes in stainless steel with drilling depth > 1mm. A Ti: sapphire laser at a wavelength of 800 nm and a pulse duration of 1 ps was used to percussion drill microholes with pulse energies up to 5 mJ and the corresponding maximum drilling depth was determined. Due to the low repetition rate of 1 kHz heat accumulation effects could be excluded. Furthermore, the quality of the microhole exit was investigated as a function of the peak fluence in 1 mm stainless steel, including the formation of side channels and the development of the shape of the microhole exit.

@inproceedings{feuer.2019.depth, abstract = {Based on the assumption that laser-drilled microholes can be approximated by a cone the maximum depth as a function of the laser fluence can be predicted by a simple analytical model. In this contribution, it will be shown, that the calculated maximum depth agrees well to microholes in stainless steel with drilling depth > 1mm. A Ti: sapphire laser at a wavelength of 800 nm and a pulse duration of 1 ps was used to percussion drill microholes with pulse energies up to 5 mJ and the corresponding maximum drilling depth was determined. Due to the low repetition rate of 1 kHz heat accumulation effects could be excluded. Furthermore, the quality of the microhole exit was investigated as a function of the peak fluence in 1 mm stainless steel, including the formation of side channels and the development of the shape of the microhole exit.}, added-at = {2021-09-13T12:29:05.000+0200}, author = {Feuer, Anne and Förster, Daniel J. and Weber, Rudolf and Graf, Thomas}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2a5c12b656ab54bc6fe70dc9815fafa39/ifsw}, booktitle = {Proceedings of the Lasers in Manufacturing Conference 2019}, eventdate = {June 2019}, eventtitle = {Lasers in Manufacturing Conference 2019}, interhash = {43e757b2ef681e2a1eb0c7fcd432512f}, intrahash = {a5c12b656ab54bc6fe70dc9815fafa39}, keywords = {MicroMaterialProcessing Drilling myown Laser UltrashortPulse from:annefeuer Steel}, publisher = {German Scientific Laser Society (WLT e.V.)}, timestamp = {2021-09-13T10:29:05.000+0200}, title = {Depth and quality limit for percussion-drilled microholes with depth > 1 mm using ultrashort pulsed laser radiation}, url = {https://www.wlt.de/lim/Proceedings2019/data/PDF/Contribution_349_final.pdf}, venue = {Munich, Germany}, year = 2019 }