Influence of laser power on the penetration depth and geometry of scanning tracks in selective laser melting

Wojciech Stopyra; Jarosław Kurzac; Konrad Gruber; Tomasz Kurzynowski; Edward Chlebus

doi:10.1117/12.2262079

8 December 2016 Influence of laser power on the penetration depth and geometry of scanning tracks in selective laser melting

Wojciech Stopyra, Jarosław Kurzac, Konrad Gruber, Tomasz Kurzynowski, Edward Chlebus

Author Affiliations +

Proceedings Volume 10159, Laser Technology 2016: Progress and Applications of Lasers; 101590R (2016) https://doi.org/10.1117/12.2262079
Event: XIth Symposium on Laser Technology, 2016, Jastarnia, Poland

Abstract

SLM technology allows production of a fully functional objects from metal and ceramic powders, with true density of more than 99,9%. The quality of manufactured items in SLM method affects more than 100 parameters, which can be divided into fixed and variable. Fixed parameters are those whose value before the process should be defined and maintained in an appropriate range during the process, e.g. chemical composition and morphology of the powder, oxygen level in working chamber, heating temperature of the substrate plate. In SLM technology, five parameters are variables that optimal set allows to produce parts without defects (pores, cracks) and with an acceptable speed. These parameters are: laser power, distance between points, time of exposure, distance between lines and layer thickness. To develop optimal parameters thin walls or single track experiments are performed, to select the best sets narrowed to three parameters: laser power, exposure time and distance between points. In this paper, the effect of laser power on the penetration depth and geometry of scanned single track was shown. In this experiment, titanium (grade 2) substrate plate was used and scanned by fibre laser of 1064 nm wavelength. For each track width, height and penetration depth of laser beam was measured.

Citation Download Citation

Wojciech Stopyra, Jarosław Kurzac, Konrad Gruber, Tomasz Kurzynowski, and Edward Chlebus "Influence of laser power on the penetration depth and geometry of scanning tracks in selective laser melting", Proc. SPIE 10159, Laser Technology 2016: Progress and Applications of Lasers, 101590R (8 December 2016); https://doi.org/10.1117/12.2262079

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