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In-situ micro-tensile testing of additive manufactured maraging steels in the SEM: Influence of build orientation, thickness and roughness on the resulting mechanical properties
Dalarna University, School of Technology and Business Studies, Materials Technology.ORCID iD: 0000-0001-7938-9909
Uddeholms AB, SE-68385 Hagfors, Sweden..
Orebro Univ, Dept Mech Engn, SE-70182 Orebro, Sweden..
Dalarna University, School of Technology and Business Studies, Materials Technology.
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2018 (English)In: La Metallurgia Italiana, ISSN 0026-0843, no 3, p. 27-33Article in journal (Refereed) Published
Abstract [en]

Selective laser melting (SLM) is frequently used additive manufacturing technique capable of producing various complex parts including thin-wall sections. However the surface roughness is a limiting factor in thin sections produced by SLM process when strength is the main criterion. In this study, the influence of build orientation, thickness and roughness on the resulting mechanical properties of as-built test samples was investigated. Various thin sheets of EN 1.2709 maraging steel built in horizontal and vertical orientations produced by SLM were investigated using in-situ micro-tensile testing in a scanning electron microscope. The mechanical strength and deformation mechanisms were analyzed and explained based on thickness and build orientation. Increased ductility was observed in thicker samples as well as in the horizontal build samples. The results illustrate the potential of the in-situ test technique and aspects important to consider in design guidelines for thin AM structures.

Place, publisher, year, edition, pages
ASSOC ITALIANA METALLURGIA , 2018. no 3, p. 27-33
Keywords [en]
SELECTIVE LASER MELTING, IN-SITU MICRO-TENSILE TESTING, BUILD ORIENTATION, DEFORMATION MECHANISM AND MARAGING STEEL
National Category
Materials Engineering
Research subject
Steel Forming and Surface Engineering
Identifiers
URN: urn:nbn:se:du-28114ISI: 000435488500005OAI: oai:DiVA.org:du-28114DiVA, id: diva2:1230955
Available from: 2018-07-05 Created: 2018-07-05 Last updated: 2018-07-05Bibliographically approved

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CiteExportLink to record
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