Relation between Tensile Strut and Compressive Foam Deformation Behaviour: Failure Mechanisms and the Influence of Dendritic Versus Globular Grain Structure in an AlSi7Mg0.3 (A356) Precision?Cast Open?Cell Foam

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dc.contributor.authorKaya, Ali Can
dc.contributor.authorBlond, Aurelien
dc.contributor.authorFiroozbakht, Mahan
dc.contributor.authorBührig-Polaczek, Andreas
dc.contributor.authorFleck, Claudia
dc.date.accessioned2024-10-02T18:13:08Z
dc.date.available2024-10-02T18:13:08Z
dc.date.issued2024
dc.departmentTAÜ, Mühendislik Fakültesi, Mekatronik Mühendisliği Bölümüen_US
dc.description.abstractOpen-cell aluminum foams are gaining importance for the design of lightweightstructures and as electrodes in lithium-ion batteries. AlSi7Mg0.3 foams areproduced by a modi?ed investment casting process. By tuning the mold tem-perature, a change from the usual nearly monocrystalline dendritic to a poly-crystalline globular grain structure is achieved. Tension and compression tests onsingle struts and foam specimens, respectively, are combined with digital imagecorrelation, scanning electron microscopy, and phase contrast-enhancedmicrocomputed tomography in a synchrotron facility to correlate the mechanicalproperties and the failure mechanisms with the microstructure. The “globular”foams exhibit a lower strength and a less pronounced subsequent stress dropthan the “dendritic” foams and the deformation mechanism changes from shearband-dominated failure to a layer-by-layer collapse, because of the lower strengthand higher ductility of the “globular” struts. The “dendritic” struts have a morehomogeneous microstructure, while the “globular” struts often contain siliconagglomerates in their central region. Accordingly, the latter struts exhibit a higherdegree of scatter for the fracture strain. Thus, the arrangement of the siliconparticles and the eutectic determines the mechanical properties on the strut leveland thereby the failure behavior on the foam level.
dc.identifier.citationKaya, Ali C., Blond, A., Firoozbakht, M., Bührig-Polaczek, A., Fleck, C. (2024). Relation between Tensile Strut and Compressive Foam Deformation Behaviour: Failure Mechanisms and the Influence of Dendritic Versus Globular Grain Structure in an AlSi7Mg0.3 (A356) Precision?Cast Open?Cell Foam. Advanced Engineering Materials, 26, 1438-1656.
dc.identifier.doi10.1002/adem.202400158
dc.identifier.endpage1656en_US
dc.identifier.issue26en_US
dc.identifier.scopus2-s2.0-85198434104
dc.identifier.startpage1438en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12846/1372
dc.identifier.wosWOS:001269737700001
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.relation.ispartofAdvanced Engineering Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleRelation between Tensile Strut and Compressive Foam Deformation Behaviour: Failure Mechanisms and the Influence of Dendritic Versus Globular Grain Structure in an AlSi7Mg0.3 (A356) Precision?Cast Open?Cell Foam
dc.typeArticle

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