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Tensile properties and microstructure of direct metal laser-sintered TI6AL4V (ELI) alloy
Cent Univ Technol, Dept Mech & Mech Engn, Bloemfontein, Free State, South Africa.
Karlstad University, Faculty of Technology and Science, Department of Mechanical and Materials Engineering. (Materials Engineering, Materials Science)ORCID iD: 0000-0002-9441-2502
Urals Branch Acad Sci, Inst Met Phys, Ekaterinburg, Russia.
Univ Stellenbosch, CT Scanner Facil, Stellenbosch, South Africa.
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2016 (English)In: South African Journal of Industrial Engineering, ISSN 1012-277X, E-ISSN 2224-7890, Vol. 27, no 3, 110-121 p.Article in journal (Refereed) Published
Abstract [en]

Direct metal laser sintering (DMLS) is an additive manufacturing technology used to melt metal powder by high laser power to produce customised parts, light-weight structures, or other complex objects. During DMLS, powder is melted and solidified track-by-track and layer-by-layer; thus, building direction can influence the mechanical properties of DMLS parts. The mechanical properties and microstructure of material produced by DMLS can depend on the powder properties, process parameters, scanning strategy, and building geometry. In this study, the microstructure, tensile properties, and porosity of DMLS Ti6Al4V (ELI) horizontal samples were analysed. Defect analysis by CT scans in pre-strained samples was used to detect the crack formation mechanism during tensile testing of as-built and heat-treated samples. The mechanical properties of the samples before and after stress relieving are discussed. 

Place, publisher, year, edition, pages
Johannesburg, 2016. Vol. 27, no 3, 110-121 p.
Keyword [en]
direct metal laser sintering, tensile properties, microstructure, Ti6Al4V
National Category
Materials Engineering
Research subject
Materials Science
Identifiers
URN: urn:nbn:se:kau:diva-47570DOI: 10.7166/27-3-1667ISI: 000389635100010OAI: oai:DiVA.org:kau-47570DiVA: diva2:1061975
Available from: 2017-01-04 Created: 2017-01-04 Last updated: 2017-08-09Bibliographically approved

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Publisher's full texthttp://sajie.journals.ac.za/pub/article/view/1667

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