Characterization of 17-4ph single tracks produced at different parametric conditions towards increased productivity of lpbf systems—the effect of laser power and spot size upscaling

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dc.contributor.author Makoana, Nkutwane Washington
dc.contributor.author Yadroitsava, Ina
dc.contributor.author Moller, Heinrich
dc.contributor.author Yadroitsev, Igor
dc.date.accessioned 2018-10-12T09:24:13Z
dc.date.available 2018-10-12T09:24:13Z
dc.date.issued 2018-06-22
dc.description.abstract Global industrial adoption of laser-based powder bed fusion (LPBF) technology is still limited by the production speed, the size of the build envelope, and therefore the maximum part size that can be produced. The cost of LPBF can be driven down further by improving the build rates without compromising structural integrity. A common approach is that the build rate can be improved by increasing the laser power and beam diameter to instantly melt a large area of powder, thus reducing the scanning time for each layer. The aim of this study was to investigate the aspects of upscaling LPBF processing parameters on the characteristic formation of stable single tracks, which are the primary building blocks for this technology. Two LPBF systems operating independently, using different parameter regimes, were used to produce the single tracks on a solid substrate deposited with a thin powder layer. The results obtained indicate that higher laser power and spot size can be used to produce stable tracks while the linear energy input is increased. It was also shown statistically that the geometrical characteristics of single tracks are mainly affected by the laser power and scanning speed during the scanning of a thin powder layer. en_ZA
dc.description.department Materials Science and Metallurgical Engineering en_ZA
dc.description.librarian am2018 en_ZA
dc.description.sponsorship The Department of Science and Technology and National Research Foundation of South Africa (Grant number 97994). en_ZA
dc.description.uri http://www.mdpi.com/journal/metals en_ZA
dc.identifier.citation Makoana, N.W., Yadroitsava, I., Möller, H. et al. 2018, 'Characterization of 17-4ph single tracks produced at different parametric conditions towards increased productivity of lpbf systems—the effect of laser power and spot size upscaling', Metals, vol. 8, art. 475, pp. 1-13. en_ZA
dc.identifier.issn 2075-4701 (online)
dc.identifier.other 10.3390/met8070475
dc.identifier.uri http://hdl.handle.net/2263/66858
dc.language.iso en en_ZA
dc.publisher MDPI Publishing en_ZA
dc.rights © 2018 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/). en_ZA
dc.subject Metal powder en_ZA
dc.subject Molten pool en_ZA
dc.subject Process mapping en_ZA
dc.subject Stainless steel en_ZA
dc.subject Laser-based powder bed fusion (LPBF) en_ZA
dc.title Characterization of 17-4ph single tracks produced at different parametric conditions towards increased productivity of lpbf systems—the effect of laser power and spot size upscaling en_ZA
dc.type Article en_ZA


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