Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic Foams
In this study, iron-based metal matrix syntactic foam (MMSF) containing hollow glass microspheres as filler was investigated with respect to notch sensitivity aspects. The MMSF was produced by means of metal powder injection molding. The notch sensitivity was studied via (i) elastic-plastic fracture...
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MDPI AG
2020-06-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/11/2566 |
| _version_ | 1797566108895543296 |
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| author | Dirk Lehmhus Jörg Weise Attila Szlancsik Imre Norbert Orbulov |
| author_facet | Dirk Lehmhus Jörg Weise Attila Szlancsik Imre Norbert Orbulov |
| author_sort | Dirk Lehmhus |
| collection | DOAJ |
| description | In this study, iron-based metal matrix syntactic foam (MMSF) containing hollow glass microspheres as filler was investigated with respect to notch sensitivity aspects. The MMSF was produced by means of metal powder injection molding. The notch sensitivity was studied via (i) elastic-plastic fracture mechanics measurements (determination of R-curves based on three-point bending tests) and (ii) Charpy impact tests. In both cases, the samples were machined with two different (U- and V-shaped) notch geometries. The critical J-integral value was determined for both notch types, which resulted in lower fracture toughness values in the case of the V-shaped notches and thus notch sensitivity of the material. This finding can be connected to the characteristics of the deformation zone and the associated stress concentration at the tip of the machined notches. The results were confirmed by Charpy impact tests showing ~30% higher impact energy in the case of the U-shaped notch. The failure modes were investigated by means of scanning electron microscopy. In contrast to the bulk material, the MMSF showed brittle fracture behavior. |
| first_indexed | 2024-03-10T19:22:03Z |
| format | Article |
| id | doaj.art-ae4e2a590aa34aa291e3bc52e50cc029 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T19:22:03Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-ae4e2a590aa34aa291e3bc52e50cc0292023-11-20T02:52:07ZengMDPI AGMaterials1996-19442020-06-011311256610.3390/ma13112566Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic FoamsDirk Lehmhus0Jörg Weise1Attila Szlancsik2Imre Norbert Orbulov3Department of Shaping and Functional Materials, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Strasse 12, 28359 Bremen, GermanyDepartment of Shaping and Functional Materials, Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Strasse 12, 28359 Bremen, GermanyDepartment of Materials Science and Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3, 1111 Budapest, HungaryDepartment of Materials Science and Engineering, Budapest University of Technology and Economics, Műegyetem rakpart 3, 1111 Budapest, HungaryIn this study, iron-based metal matrix syntactic foam (MMSF) containing hollow glass microspheres as filler was investigated with respect to notch sensitivity aspects. The MMSF was produced by means of metal powder injection molding. The notch sensitivity was studied via (i) elastic-plastic fracture mechanics measurements (determination of R-curves based on three-point bending tests) and (ii) Charpy impact tests. In both cases, the samples were machined with two different (U- and V-shaped) notch geometries. The critical J-integral value was determined for both notch types, which resulted in lower fracture toughness values in the case of the V-shaped notches and thus notch sensitivity of the material. This finding can be connected to the characteristics of the deformation zone and the associated stress concentration at the tip of the machined notches. The results were confirmed by Charpy impact tests showing ~30% higher impact energy in the case of the U-shaped notch. The failure modes were investigated by means of scanning electron microscopy. In contrast to the bulk material, the MMSF showed brittle fracture behavior.https://www.mdpi.com/1996-1944/13/11/2566metal matrix syntactic foamcomposite foamhollow glass microspherefracture toughnessfracture mechanics |
| spellingShingle | Dirk Lehmhus Jörg Weise Attila Szlancsik Imre Norbert Orbulov Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic Foams Materials metal matrix syntactic foam composite foam hollow glass microsphere fracture toughness fracture mechanics |
| title | Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic Foams |
| title_full | Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic Foams |
| title_fullStr | Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic Foams |
| title_full_unstemmed | Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic Foams |
| title_short | Fracture Toughness of Hollow Glass Microsphere-Filled Iron Matrix Syntactic Foams |
| title_sort | fracture toughness of hollow glass microsphere filled iron matrix syntactic foams |
| topic | metal matrix syntactic foam composite foam hollow glass microsphere fracture toughness fracture mechanics |
| url | https://www.mdpi.com/1996-1944/13/11/2566 |
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