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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
Dalarna University, School of Technology and Business Studies, Materials Technology.
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2017 (English)In: Euro PM2017 Congress Proceedings: Session 30: Mechanical Behaviour of AM Materials, 2017, article id Session 30Conference paper, Published paper (Refereed)
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
2017. article id Session 30
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-26381OAI: oai:DiVA.org:du-26381DiVA, id: diva2:1147762
Conference
Euro PM2017 Congress & Exhibition, Milan, Italy, 1 – 5 October 2017
Funder
Knowledge FoundationAvailable from: 2017-10-08 Created: 2017-10-08 Last updated: 2018-06-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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