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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, Falun, Sweden. (ATOAM)
Uddeholms AB, Sweden. (ATOAM)
Örebro University, School of Science and Technology. (ATOAM)ORCID iD: 0000-0002-8144-8821
Dalarna University, Falun, Sweden. (ATOAM)
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2017 (English)Conference 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.
Keyword [en]
additive manufacturing, selective laser melting, in-situ micro-tensile testing, build orientation, deformation mechanism, maraging steel
National Category
Mechanical Engineering Materials Engineering
Research subject
Mechanical Engineering
Identifiers
URN: urn:nbn:se:oru:diva-58194OAI: oai:DiVA.org:oru-58194DiVA: diva2:1114116
Conference
Euro PM2017, Milan, Italy, October 1-5, 2017
Projects
ATOAM
Funder
Knowledge Foundation
Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2017-10-18Bibliographically approved

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Karlsson, PatrikPejryd, Lars

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • nn-NO
  • nn-NB
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