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In Situ CT Tensile Testing of an Additively Manufactured and Heat-Treated Metastable ß-Titanium Alloy (Ti-5Al-5Mo-5V-3Cr)
Institute of Materials Science, Technische Universität Dresden, Helmholtzstr. 7, 01069 Dresden, Germany; Fraunhofer—Institute for Material and Beam Technology (IWS—Dresden), Winterbergstraße 28, 01069 Dresden, Germany.
Institute of Materials Science, Technische Universität Dresden, Helmholtzstr. 7, 01069 Dresden, Germany.
Institute of Materials Science, Technische Universität Dresden, Helmholtzstr. 7, 01069 Dresden, Germany; Fraunhofer—Institute for Material and Beam Technology (IWS—Dresden), Winterbergstraße 28, 01069 Dresden, Germany.ORCID-id: 0000-0001-8126-8532
Fraunhofer—Institute for Material and Beam Technology (IWS—Dresden), Winterbergstraße 28, 01069 Dresden, Germany.ORCID-id: 0000-0003-1716-2156
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2021 (engelsk)Inngår i: Applied Sciences, E-ISSN 2076-3417, Vol. 11, nr 21, artikkel-id 9875Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Additive manufacturing has been considered a suitable process for developing high-performance parts of medical or aerospace industries. The electron beam powder bed fusion process, EB-PBF, is a powder bed fusion process carried out in a vacuum, in which the parts are melted using a highly focused electron beam. The material class of metastable β-titanium alloys, and especially Ti-5Al-5Mo-5V-3Cr, show great potential for use as small and highly complex load-bearing parts. Specimens were additively manufactured with optimised process parameters and different heat treatments used in order to create tailored mechanical properties. These heat-treated specimens were analysed with regard to their microstructure (SEM) and their mechanical strength (tensile testing). Furthermore, in situ tensile tests, using a Deben CT5000 and a YXLON ff35 industrial µ-CT, were performed and failure-critical defects were detected, analysed and monitored. Experimental results indicate that, if EB-PBF-manufactured Ti-5553 is heat-treated differently, a variety of mechanical properties are possible. Regarding their fracture mechanisms, failure-critical defects can be detected at different stages of the tensile test and defect growth behaviour can be analysed.

sted, utgiver, år, opplag, sider
MDPI, 2021. Vol. 11, nr 21, artikkel-id 9875
Emneord [en]
additive manufacturing, electron beam powder bed fusion, titanium alloy, process– structure–property relationship, industrial computer tomography, non-destructive-evaluation, in situ tensile testing, materials characterisation
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URN: urn:nbn:se:ltu:diva-87715DOI: 10.3390/app11219875ISI: 000778164200005Scopus ID: 2-s2.0-85117561688OAI: oai:DiVA.org:ltu-87715DiVA, id: diva2:1607521
Merknad

Validerad;2021;Nivå 2;2021-11-01 (beamah);

Funder: Bundesministerium für Bildung und Forschung (03ZZ0212G)

Tilgjengelig fra: 2021-11-01 Laget: 2021-11-01 Sist oppdatert: 2022-04-21bibliografisk kontrollert

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Brückner, Frank

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