Comparison of microstructure and mechanical properties of Scalmalloy® produced by selective laser melting and laser metal deposition
| dc.contributor.author | Awd, Mustafa | |
| dc.contributor.author | Tenkamp, Jochen | |
| dc.contributor.author | Hirtler, Markus | |
| dc.contributor.author | Siddique, Shafaqat | |
| dc.contributor.author | Bambach, Markus | |
| dc.contributor.author | Walther, Frank | |
| dc.date.accessioned | 2019-12-19T13:27:00Z | |
| dc.date.available | 2019-12-19T13:27:00Z | |
| dc.date.issued | 2017-12-23 | |
| dc.description.abstract | The 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 strength | en |
| dc.identifier.uri | http://hdl.handle.net/2003/38458 | |
| dc.identifier.uri | http://dx.doi.org/10.17877/DE290R-20377 | |
| dc.language.iso | en | de |
| dc.relation.ispartofseries | Materials : Jg.: 11, Heft: 1 | S. 17-1-17-17; | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Scalmalloy® | en |
| dc.subject | Additive manufacturing | en |
| dc.subject | Mechanical properties | en |
| dc.subject | Damage mechanisms | en |
| dc.subject.ddc | 660 | |
| dc.subject.rswk | Rapid Prototyping <Fertigung> | de |
| dc.subject.rswk | Mechanische Eigenschaft | de |
| dc.subject.rswk | Schadensmechanik | de |
| dc.subject.rswk | Legierung | de |
| dc.title | Comparison of microstructure and mechanical properties of Scalmalloy® produced by selective laser melting and laser metal deposition | en |
| dc.type | Text | de |
| dc.type.publicationtype | article | de |
| dcterms.accessRights | open access | |
| eldorado.secondarypublication | true | de |
| eldorado.secondarypublication.primarycitation | Materials : Jg. 11, 2017, Heft 1 | S. 17-1-17-17 | de |
| eldorado.secondarypublication.primaryidentifier | https://doi.org/10.3390/ma11010017 | de |