Influence of water layer thickness on crater volume for nanosecond pulsed laser ablation of stainless steel

被引:0
作者
S. van der Linden
R. Hagmeijer
G. R. B. E. Römer
机构
[1] University of Twente,Department of Mechanics of Solids, Surfaces and Systems
[2] University of Twente,Department of Engineering Fluid Dynamics
来源
Applied Physics A | 2023年 / 129卷
关键词
Ablation; Water; Air; Laser; Nanosecond; Stainless steel;
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摘要
Under water laser ablation is a surface texturization method used to form micrometer-sized surface structures. Plasma confinement and cavitation bubble evolution play a critical role during the ablation process and their influence on material removal is strongly tied to liquid layer thickness. To influence the effects of these processes, such that material removal is at its maximum, an optimal layer thickness was found for various laser parameters. Specifically, for nanosecond pulsed laser ablation of stainless steel, however, the relation between layer thickness and volume removal is still unknown. Here, we show the relation between water layer thickness and removed material volume for a nanosecond pulsed laser. Results reveal that volume removal is at its maximum for a 1 mm water layer and drops by a factor of 2 when the layer thickness is increased to 2 mm. A further increase of layer thickness to 3 up to 10 mm shows a negligible effect on volume removal and removed volume amounts are shown to be similar to those obtained in ambient air in this water layer thickness range. This trend echo’s results obtained for nanosecond pulsed silicon ablation. The obtained results identify processing conditions which allow for faster and therefore more cost efficient texturization of stainless steel surfaces in the future.
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