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Effect of scanning strategy in the l‐pbf process of 18ni300 maraging steel
Department of Industrial Engineering, School of Engineering, University of Bologna, Viale del Risorgimento 2, Bologna, 40136, Italy.
Department of Industrial Engineering, School of Engineering, University of Bologna, Viale del Risorgimento 2, Bologna, 40136, Italy.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-0101-0062
Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design, JTH, Product design and development (PDD).ORCID iD: 0000-0001-6278-2499
2021 (English)In: Metals, ISSN 2075-4701, Vol. 11, no 5, article id 826Article in journal (Refereed) Published
Abstract [en]

Maraging steels are good candidates for the laser powder bed fusion process (L‐PBF), also known as Selective Laser Melting, due to excellent weldability and resistance to quench cracking. Powders physical and chemical characteristics dominate the final microstructure and properties of the printed parts, that are also heavily influenced by the process parameters. In this study, the effects of the scanning strategies on dimensions, average surface roughness, density and material hardness were evaluated, keeping the powder type and the volumetric energy density (Andrew number) constant. The effects of the scanning strategy on these properties are far less understood than on other important ones, like residual stresses and distortion, strongly affected by the scanning strategy. In this study, parallel stripes, chessboard and hexagonal pattern strategies were studied, keeping the Andrew number constant but varying the interlayer rotation. In general, the hexagonal strategy underperformed compared to the chessboard and the stripes ones.

Place, publisher, year, edition, pages
MDPI, 2021. Vol. 11, no 5, article id 826
Keywords [en]
Additive manufacturing, Average surface roughness, Density, Dimension tolerance, Hardness, Laser powder bed fusion, L‐PBF, Maraging steel, Process parameters, Scanning strategy, Selective laser melting
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-52515DOI: 10.3390/met11050826ISI: 000662585500001Scopus ID: 2-s2.0-85105859390Local ID: GOA;intsam;743157OAI: oai:DiVA.org:hj-52515DiVA, id: diva2:1556689
Available from: 2021-05-24 Created: 2021-05-24 Last updated: 2021-07-15Bibliographically approved

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Jarfors, Anders E.W.Stolt, Roland

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