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dc.contributor.authorAwd, Mustafa-
dc.contributor.authorTenkamp, Jochen-
dc.contributor.authorHirtler, Markus-
dc.contributor.authorSiddique, Shafaqat-
dc.contributor.authorBambach, Markus-
dc.contributor.authorWalther, Frank-
dc.date.accessioned2019-12-19T13:27:00Z-
dc.date.available2019-12-19T13:27:00Z-
dc.date.issued2017-12-23-
dc.identifier.urihttp://hdl.handle.net/2003/38458-
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-20377-
dc.description.abstractThe second-generation aluminum-magnesium-scandium (Al-Mg-Sc) alloy, which is often referred to as Scalmalloy®, has been developed as a high-strength aluminum alloy for selective laser melting (SLM). The high-cooling rates of melt pools during SLM establishes the thermodynamic conditions for a fine-grained crack-free aluminum structure saturated with fine precipitates of the ceramic phase Al3-Sc. The precipitation allows tensile and fatigue strength of Scalmalloy® to exceed those of AlSi10Mg by ~70%. Knowledge about properties of other additive manufacturing processes with slower cooling rates is currently not available. In this study, two batches of Scalmalloy® processed by SLM and laser metal deposition (LMD) are compared regarding microstructure-induced properties. Microstructural strengthening mechanisms behind enhanced strength and ductility are investigated by scanning electron microscopy (SEM). Fatigue damage mechanisms in low-cycle (LCF) to high-cycle fatigue (HCF) are a subject of study in a combined strategy of experimental and statistical modeling for calculation of Woehler curves in the respective regimes. Modeling efforts are supported by non-destructive defect characterization in an X-ray computed tomography (µ-CT) platform. The investigations show that Scalmalloy® specimens produced by LMD are prone to extensive porosity, contrary to SLM specimens, which is translated to ~30% lower fatigue strengthen
dc.language.isoende
dc.relation.ispartofseriesMaterials : Jg.: 11, Heft: 1 | S. 17-1-17-17;-
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/-
dc.subjectScalmalloy®en
dc.subjectAdditive manufacturingen
dc.subjectMechanical propertiesen
dc.subjectDamage mechanismsen
dc.subject.ddc660-
dc.titleComparison of microstructure and mechanical properties of Scalmalloy® produced by selective laser melting and laser metal depositionen
dc.typeTextde
dc.type.publicationtypearticlede
dc.subject.rswkRapid Prototyping <Fertigung>de
dc.subject.rswkMechanische Eigenschaftde
dc.subject.rswkSchadensmechanikde
dc.subject.rswkLegierungde
dcterms.accessRightsopen access-
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.3390/ma11010017de
eldorado.secondarypublication.primarycitationMaterials : Jg. 11, 2017, Heft 1 | S. 17-1-17-17de
Appears in Collections:Fachgebiet Werkstoffprüftechnik

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