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Areal surface topography representation of as-built and post-processed samples produced by powder bed fusion using laser beam melting
Halmstad University, Sweden.
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology. Halmstad University, Sweden.ORCID iD: 0000-0001-7501-8318
Halmstad University, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Manufacturing Processes. Chalmers University of Technology, Sweden.ORCID iD: 0000-0003-3656-1806
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2020 (English)In: Surface Topography: Metrology and Properties, ISSN 2051-672X, Vol. 8, no 2, article id 024012Article in journal (Refereed) Published
Abstract [en]

The increasing interest in Additive Manufacturing (AM) is due to its huge advantage in producing parts without any geometrical limitations. It is due to this reason, AM is extensively utilized in automotive, aerospace, medical and dental applications. Despite their popularity, AM is often associated with inferior surface quality which is one of the many reasons why it has failed to fully replace traditional methods. Hence, AM is always followed by a subsequent post-processing step to produce the end-product. To establish control over the surface quality it is first necessary to fully understand the surface behaviour concerning the factors affecting it. In this paper, the focus is mainly on having a better understanding of the surfaces by using scale-sensitive fractal analysis. In addition, the paper documents the influence of build inclination and post-processing in particular shot blasting on surface topography and utilizes a multi-scale approach to identify the most important scale and parameters for characterization. Results of this study reveal that shot blasting has a minimalistic effect on surface features at a large scale as it cannot remove the waviness completely. At smaller scales, blasting imparts additional features on the surface due to the impact of abrasive particles at high pressure. At the intermediate scales, the influence of shot blasting is highest as it successfully eliminates the surface features comprising of partially melted powder particles and stair-step effect.

Place, publisher, year, edition, pages
IOP Publishing Ltd , 2020. Vol. 8, no 2, article id 024012
Keywords [en]
additive manufacturing, areal surface texture parameters, laser beam melting, powder based fusion, scale sensitive fractal analysis, shot blasting, surface metrology, Blasting, Laser beams, Metal cleaning, Quality control, Surface properties, Surface topography, Abrasive particles, Areal surface topographies, Dental applications, Fractal analysis, Multi-scale approaches, Powder particles, Stair-step effect, Topography
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-45628DOI: 10.1088/2051-672X/ab9b73Scopus ID: 2-s2.0-85087902603OAI: oai:DiVA.org:ri-45628DiVA, id: diva2:1458049
Available from: 2020-08-13 Created: 2020-08-13 Last updated: 2023-05-22Bibliographically approved

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