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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(2)O(3), 48 wt % SiO(2), 19 wt % Al(2)O(3)∙SiO(2)). The infiltrated blocks were machined by different geometry tools in order to produce notch...

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Autores principales: Szlancsik, Attila, Katona, Bálint, Károly, Dóra, Orbulov, Imre Norbert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416609/
https://www.ncbi.nlm.nih.gov/pubmed/30769868
http://dx.doi.org/10.3390/ma12040574
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author Szlancsik, Attila
Katona, Bálint
Károly, Dóra
Orbulov, Imre Norbert
author_facet Szlancsik, Attila
Katona, Bálint
Károly, Dóra
Orbulov, Imre Norbert
author_sort Szlancsik, Attila
collection PubMed
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(2)O(3), 48 wt % SiO(2), 19 wt % Al(2)O(3)∙SiO(2)). 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.
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spelling pubmed-64166092019-03-29 Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams Szlancsik, Attila Katona, Bálint Károly, Dóra Orbulov, Imre Norbert Materials (Basel) Article 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(2)O(3), 48 wt % SiO(2), 19 wt % Al(2)O(3)∙SiO(2)). 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. MDPI 2019-02-14 /pmc/articles/PMC6416609/ /pubmed/30769868 http://dx.doi.org/10.3390/ma12040574 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Szlancsik, Attila
Katona, Bálint
Károly, Dóra
Orbulov, Imre Norbert
Notch (In)Sensitivity of Aluminum Matrix Syntactic Foams
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 Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416609/
https://www.ncbi.nlm.nih.gov/pubmed/30769868
http://dx.doi.org/10.3390/ma12040574
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