ǂThe ǂinfluence of the processing parameters on the laser-ablation of stainless steel and brass during the engraving by nanosecond fiber laser

Luka Hribar (Author), Peter Gregorčič (Author), Matej Senegačnik (Author), Matija Jezeršek (Author)

Abstract

In this paper, we investigate the influence of the following parameters: pulse duration, pulse repetition rate, line-to-line and pulse-to-pulse overlaps, and scanning strategy on the ablation of AISI 316L steel and CuZn37 brass with a nanosecond, 1064-nm, Yb fiber laser. The results show that the material removal rate (MRR) increases monotonically with pulse duration up to the characteristic repetition rate (f0) where pulse energy and average power are maximal. The maximum MRR is reached at a repetition rate that is equal or slightly higher as f0. The exact value depends on the correlation between the fluence of the laser pulses and the pulse repetition rate, as well as on the material properties of the sample. The results show that shielding of the laser beam by plasma and ejected material plays an important role in reducing the MRR. The surface roughness is mainly influenced by the line-to-line and the pulse-to-pulse overlaps, where larger overlap leads to lower roughness. Process optimization indicates that while operating with laser processing parameters resulting in the highest MRR, the best ratio between the MRR and surface roughness appears at ~50% overlap of the laser pulses, regardless of the material being processed.

Keywords

laserska ablacija;graviranje;vlakenski laserji;laser ablation;engraving;fiber lasers;material removal rate;laser-material interaction;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	535
COBISS:	93100547
ISSN:	2079-4991
Views:	246
Downloads:	121
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	laserska ablacija;graviranje;vlakenski laserji;
Type (COBISS):	Article
Pages:	str. 1-20
Volume:	ǂVol. ǂ12
Issue:	ǂiss. ǂ2
Chronology:	Jan. 2022
DOI:	10.3390/nano12020232
ID:	14229728