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dc.contributor.author
Hemes, Susanne
dc.contributor.author
Meiners, Frank
dc.contributor.author
Sizova, Irina
dc.contributor.author
Hama-Saleh, Rebar
dc.contributor.author
Röhrens, Daniel
dc.contributor.author
Weisheit, Andreas
dc.contributor.author
Häfner, Constantin L.
dc.contributor.author
Bambach, Markus
dc.date.accessioned
2021-03-17T10:05:33Z
dc.date.available
2021-03-14T05:20:57Z
dc.date.available
2021-03-17T10:05:33Z
dc.date.issued
2021-02
dc.identifier.issn
1996-1944
dc.identifier.other
10.3390/ma14041039
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/474299
dc.identifier.doi
10.3929/ethz-b-000474299
dc.description.abstract
In the present study, we propose a hybrid manufacturing route to produce high-quality Ti6Al4V parts, combining additive powder laser directed energy deposition (L-DED) for manufacturing of preforms, with subsequent hot forging as a thermomechanical processing (TMP) step. After L-DED, the material was hot formed at two different temperatures (930 °C and 1070 °C) and subsequently heat-treated for stress relief annealing. Tensile tests were performed on small sub-samples, taking into account different sample orientations with respect to the L-DED build direction and resulting in very good tensile strengths and ductility properties, similar or superior to the forged material. The resulting microstructure consists of very fine grained, partially globularized alpha grains, with a mean diameter ~0.8–2.3 µm, within a beta phase matrix, constituting between 2 and 9% of the sample. After forging in the sub-beta transus temperature range, the typical L-DED microstructure was no longer discernible and the anisotropy in tensile properties, common in additive manufacturing (AM), was significantly reduced. However, forging in the super-beta transus temperature range resulted in remaining anisotropies in the mechanical properties as well as an inferior tensile strength and ductility of the material. It was shown, that by combining L-DED with thermomechanical processing in the sub-beta transus temperature range of Ti6Al4V, a suitable microstructure and desirable mechanical properties for many applications can be obtained, with the advantage of reducing the material waste.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
MDPI
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
laser directed energy deposition (L-DED)
en_US
dc.subject
thermomechanical processing (TMP)
en_US
dc.subject
Ti6Al4V
en_US
dc.subject
hybrid manufacturing
en_US
dc.title
Microstructures and Mechanical Properties of Hybrid, Additively Manufactured Ti6Al4V after Thermomechanical Processing
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-02-22
ethz.journal.title
Materials
ethz.journal.volume
14
en_US
ethz.journal.issue
4
en_US
ethz.pages.start
1039
en_US
ethz.size
13 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.scopus
ethz.publication.place
Basel
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2021-03-14T05:21:08Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-03-17T10:05:48Z
ethz.rosetta.lastUpdated
2021-03-17T10:05:48Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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