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Additive Manufacturing of Binary Ni–Ti Shape Memory Alloys Using Electron Beam Powder Bed Fusion: Functional Reversibility Through Minor Alloy Modification and Carbide Formation

dc.date.accessioned2023-01-27T17:15:51Z
dc.date.available2023-01-27T17:15:51Z
dc.date.issued2022-11-30
dc.identifierdoi:10.17170/kobra-202301057316
dc.identifier.urihttp://hdl.handle.net/123456789/14391
dc.description.sponsorshipGefördert im Rahmen des Projekts DEALger
dc.language.isoengeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectshape memory alloyeng
dc.subjectadditive manufacturingeng
dc.subjectsuperelasticityeng
dc.subjectmicrostructureeng
dc.subject.ddc660
dc.titleAdditive Manufacturing of Binary Ni–Ti Shape Memory Alloys Using Electron Beam Powder Bed Fusion: Functional Reversibility Through Minor Alloy Modification and Carbide Formationeng
dc.typeAufsatz
dcterms.abstractShape memory alloys (SMAs), such as Ni–Ti, are promising candidates for actuation and damping applications. Although processing of Ni–Ti bulk materials is challenging, well-established processing routes (i.e. casting, forging, wire drawing, laser cutting) enabled application in several niche applications, e.g. in the medical sector. Additive manufacturing, also referred to as 4D-printing in this case, is known to be highly interesting for the fabrication of SMAs in order to produce near-net-shaped actuators and dampers. The present study investigated the impact of electron beam powder bed fusion (PBF-EB/M) on the functional properties of C-rich Ni₅₀.₉Ti₄₉.₁ alloy. The results revealed a significant loss of Ni during PBF-EB/M processing. Process microstructure property relationships are discussed in view of the applied master alloy and powder processing route, i.e. vacuum induction-melting inert gas atomization (VIGA). Relatively high amounts of TiC, being already present in the master alloy and powder feedstock, are finely dispersed in the matrix upon PBF-EB/M. This leads to a local change in the chemical composition (depletion of Ti) and a pronounced shift of the transformation temperatures. Despite the high TiC content, superelastic testing revealed a good shape recovery and, thus, a negligible degradation in both, the as-built and the heat-treated state.eng
dcterms.accessRightsopen access
dcterms.creatorKrooß, Philipp
dcterms.creatorLauhoff, Christian
dcterms.creatorGustmann, Tobias
dcterms.creatorGemming, Thomas
dcterms.creatorSobrero, Céscar E.
dcterms.creatorEwald, Felix Clemens
dcterms.creatorBrenne, Florian
dcterms.creatorArold, Tizian
dcterms.creatorNematollahi, Mohammadreza
dcterms.creatorElahinia, Mohammad
dcterms.creatorThielsch, Juliane
dcterms.creatorHufenbach, Julia Kristin
dcterms.creatorNiendorf, Thomas
dc.relation.doidoi:10.1007/s40830-022-00400-2
dc.relation.projectidProject Number 398899207eng
dc.subject.swdMemory-Legierungger
dc.subject.swdRapid Prototyping <Fertigung>ger
dc.subject.swdPseudoelastizitätger
dc.subject.swdMikrostrukturger
dc.subject.swdSchmelzenger
dc.type.versionpublishedVersion
dcterms.source.identifiereissn:2199-3858
dcterms.source.issueIssue 4
dcterms.source.journalShape Memory and Superelasticityeng
dcterms.source.pageinfo452-462
dcterms.source.volumeVolume 8
kup.iskupfalse


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