Deep channel fabrication on copper by multi-scan underwater laser machining

Deep channel fabrication on copper by multi-scan underwater laser machining
Title:
Deep channel fabrication on copper by multi-scan underwater laser machining
Other Titles:
Optics & Laser Technology
Publication Date:
06 November 2018
Citation:
Wenhe Feng, Jiang Guo, Wenjin Yan, Yin Chi Wan, Hongyu Zheng, Deep channel fabrication on copper by multi-scan underwater laser machining, Optics & Laser Technology, Volume 111, 2019, Pages 653-663, ISSN 0030-3992, https://doi.org/10.1016/j.optlastec.2018.10.046.
Abstract:
Laser machining in the nanosecond pulse regime utilises the heat induced by laser irradiation to ablate solid material, however the heat-driven ablation is very often accompanied with adverse effects such as oxidation, debris recast and burr formation. An effective technique invented to minimise these effects was underwater laser machining. In this study, we present a multi-scan laser machining process on a copper sample immersed under flowing water with a secured upper surface. The results show that channels with smaller heat affected zone (HAZ), less debris recast and minimal burr can be produced by this process. By applying multi-scan machining, channels with up to 275 µm depth, 13–22° taper angle and 1.30–6.95 µm roughness Sa were produced. Moreover, empirical models relating the processing parameters to channels’ characteristics were derived using polynomial regression (PR) analysis and a machine learning algorithm, Gaussian process regression (GPR), after which their performances in the prediction of the channels’ characteristics were validated.
License type:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Funding Info:
This work is supported by SIMTech core-funded project (No. C17-M-028) and the Fundamental Research Funds for the Central Universities (Grant No. DUT17RC(3)105).
Description:
ISSN:
0030-3992
1879-2545
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