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Microstructural and thermal stability of selective laser melted 316L stainless steel single tracks
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics. (CMM, Materials Engineering, Materiasl Science)ORCID iD: 0000-0002-9441-2502
Central University of Technology, Free State, South Africa.
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics. (CMM, Materials Engineering)
Central University of Technology, Free State, South Africa.
2017 (English)In: South African Journal of Industrial Engineering, ISSN 1012-277X, Vol. 28, no 1, 12-19 p.Article in journal (Refereed) Published
Abstract [en]

To remove residual stresses, an as-built SLM object is usually posttreated. This treatment can affect the microstructure, changing the final mechanical characteristics. This investigation is focused on the microstructural characterisation of 316L austenitic stainless steel in as-built and annealed conditions. The SLM microstructure was relatively stable up to 900°C, when cell boundaries start to disappear. At higher temperatures, an insignificant grain coarsening was detected. These microstructural changes caused a gradual drop in the hardness. The obtained result is background for the future development of post-treatment regimens to achieve a high level in the final mechanical properties of SLM objects.

Place, publisher, year, edition, pages
Stellenbosch University , 2017. Vol. 28, no 1, 12-19 p.
Keyword [en]
stainless steel, selective laser melting, microstructure, heat treatment
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:kau:diva-55209DOI: 10.7166/28-1-1466OAI: oai:DiVA.org:kau-55209DiVA: diva2:1112431
Available from: 2017-06-20 Created: 2017-06-20 Last updated: 2017-06-22Bibliographically approved

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