Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams
Aluminum alloy (Al99.5 or AlSi12)-based metal matrix syntactic foams (MMSFs) were produced by pressure infiltration with ~65 vol % Globocer filler (33 wt % Al<sub>2</sub>O<sub>3</sub>, 48 wt % SiO<sub>2</sub>, 19 wt % Al<sub>2</sub>O<sub>3</su...
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MDPI AG
2019-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/12/4/574 |
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| author | Attila Szlancsik Bálint Katona Dóra Károly Imre Norbert Orbulov |
| author_facet | Attila Szlancsik Bálint Katona Dóra Károly Imre Norbert Orbulov |
| author_sort | Attila Szlancsik |
| collection | DOAJ |
| description | Aluminum alloy (Al99.5 or AlSi12)-based metal matrix syntactic foams (MMSFs) were produced by pressure infiltration with ~65 vol % Globocer filler (33 wt % Al<sub>2</sub>O<sub>3</sub>, 48 wt % SiO<sub>2</sub>, 19 wt % Al<sub>2</sub>O<sub>3</sub>∙SiO<sub>2</sub>). The infiltrated blocks were machined by different geometry tools in order to produce notched samples. The samples were loaded in three-point bending, and the loading force values were recorded against the cross-head displacements and the crack opening displacements. To measure up the notch sensitivity and toughness of the MMSFs, the fracture energies and the fracture toughness values were determined. The results showed that the mentioned quantities are needed to describe the behavior of MMSFs. The fracture energies were shown to be notch-sensitive, while the fracture toughness values were dependent only on the matrix material and were insensitive to the notch geometry. The complex investigation of the fracture surfaces revealed strong bonding between the hollow spheres and the Al99.5 matrix due to a chemical reaction, while this bonding was found to be weaker in the case of the AlSi12 matrix. This difference resulted in completely different crack propagation modes in the case of the different matrices. |
| first_indexed | 2024-04-12T10:42:35Z |
| format | Article |
| id | doaj.art-63707a6cbe154a7fa9bf5218ac9bb0eb |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-12T10:42:35Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-63707a6cbe154a7fa9bf5218ac9bb0eb2022-12-22T03:36:33ZengMDPI AGMaterials1996-19442019-02-0112457410.3390/ma12040574ma12040574Notch (In)Sensitivity of Aluminum Matrix Syntactic FoamsAttila Szlancsik0Bálint Katona1Dóra Károly2Imre Norbert Orbulov3Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3., 1111 Budapest, HungaryDepartment of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3., 1111 Budapest, HungaryDepartment of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3., 1111 Budapest, HungaryDepartment of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3., 1111 Budapest, HungaryAluminum alloy (Al99.5 or AlSi12)-based metal matrix syntactic foams (MMSFs) were produced by pressure infiltration with ~65 vol % Globocer filler (33 wt % Al<sub>2</sub>O<sub>3</sub>, 48 wt % SiO<sub>2</sub>, 19 wt % Al<sub>2</sub>O<sub>3</sub>∙SiO<sub>2</sub>). The infiltrated blocks were machined by different geometry tools in order to produce notched samples. The samples were loaded in three-point bending, and the loading force values were recorded against the cross-head displacements and the crack opening displacements. To measure up the notch sensitivity and toughness of the MMSFs, the fracture energies and the fracture toughness values were determined. The results showed that the mentioned quantities are needed to describe the behavior of MMSFs. The fracture energies were shown to be notch-sensitive, while the fracture toughness values were dependent only on the matrix material and were insensitive to the notch geometry. The complex investigation of the fracture surfaces revealed strong bonding between the hollow spheres and the Al99.5 matrix due to a chemical reaction, while this bonding was found to be weaker in the case of the AlSi12 matrix. This difference resulted in completely different crack propagation modes in the case of the different matrices.https://www.mdpi.com/1996-1944/12/4/574metal matrix compositescellular materialsmetallic foamssyntactic foamsmechanical characterizationfracture toughnessfracture surfacefailure modes |
| spellingShingle | Attila Szlancsik Bálint Katona Dóra Károly Imre Norbert Orbulov Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams Materials metal matrix composites cellular materials metallic foams syntactic foams mechanical characterization fracture toughness fracture surface failure modes |
| title | Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams |
| title_full | Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams |
| title_fullStr | Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams |
| title_full_unstemmed | Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams |
| title_short | Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams |
| title_sort | notch in sensitivity of aluminum matrix syntactic foams |
| topic | metal matrix composites cellular materials metallic foams syntactic foams mechanical characterization fracture toughness fracture surface failure modes |
| url | https://www.mdpi.com/1996-1944/12/4/574 |
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