Compressive properties of closed-cell aluminum foams with different contents of ceramic microspheres
TL;DR: In this article, closed-cell aluminum foams with different kinds and contents of ceramic microspheres are obtained using melt-foaming method, and the distribution and the effects of the ceramic micro-spheres on the mechanical properties of aluminum Foams are investigated.
About: This article is published in Materials & Design.The article was published on 2014-04-01. It has received 72 citations till now. The article focuses on the topics: Ceramic & Compressive strength.
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TL;DR: An updated overview of the different manufacturing processes of composite and nanocomposite metal foams is provided.
Abstract: Open-cell and closed-cell metal foams have been reinforced with different kinds of micro- and nano-sized reinforcements to enhance their mechanical properties of the metallic matrix. The idea behind this is that the reinforcement will strengthen the matrix of the cell edges and cell walls and provide high strength and stiffness. This manuscript provides an updated overview of the different manufacturing processes of composite and nanocomposite metal foams.
103 citations
TL;DR: In this paper, the compressive deformation behavior of aluminum matrix syntactic foams with varying cenosphere sizes have been studied at varying strain rates (from 10 to 3∼103 s −1 ).
Abstract: The compressive deformation behavior of aluminum matrix syntactic foams with varying cenosphere sizes have been studied at varying strain rates (from 10 to 3∼103 s −1 ). The results showed that the size of the cenospheres and the strain rates had significant effects on the compressive properties. The smaller cenospheres ensured higher compressive strength due to fewer flaws in the microstructure and better mechanical stability. The energy absorption of the present syntactic foam was found to increase with an increase in strain rates. Compared to the conditions under quasi-static loading, the energy absorption capacity of syntactic foam exhibited 75–85% more under dynamic loading. The different compressive failure characteristics of syntactic foams could be attributed to the unit of shear displacement which got smaller with the increasing strain rates. These foams showed pronounced energy absorption capabilities, suggesting their potential for use in blast and impact protection.
71 citations
12 Jun 2014-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, an AlSi12 matrix hybrid MMSF with monomodal Globocer (Al 2 O 3 and SiO 2 based ceramic) and pure Fe reinforcements were produced by pressure infiltration.
Abstract: Hybrid metal matrix syntactic foams (hybrid MMSFs) are particle reinforced composites in which the reinforcement is the combination of more than one grade of hollow spheres. The difference between the spheres can be in their chemical composition, dimension, physical properties etc. In this study AlSi12 matrix hybrid MMSFs with monomodal Globocer (Al 2 O 3 and SiO 2 based ceramic) and Globomet (pure Fe) reinforcements were produced by pressure infiltration. The investigation parameters were the ratio of the hollow sphere grades and the aspect ratio of the specimens. Microstructural investigations showed almost perfect infiltration and favourable interface layer, while quasi-static compression tests showed that the composition of the reinforcement and the aspect ratio of the specimens have determinative effect on the characteristic properties (compressive and flow strength, fracture strain, stiffness and absorbed energy). This nature of the MMSFs ensures the possibility to tailor their properties in order to optimise them for a given application.
65 citations
TL;DR: In this article, the effect of strain rate on their compressive behavior was investigated as these properties are vital in terms of the applications of these materials and the degree of correlation between the numerical simulations and the experimental results has been shown to be reasonably good.
64 citations
Cites background from "Compressive properties of closed-ce..."
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TL;DR: A broad understanding of the processing and basic mechanical, microstructural, and physical properties of different types of composite metal foams is discussed in the first part of the paper as mentioned in this paper, and some recent studies on high strain rate properties, ballistic performance, radiation attenuation, and thermal properties of composites are discussed and compared with other bulk materials.
Abstract: This paper reviews the background and evolution of composite metal foam (CMF) from its inception until now. A broad understanding of the processing and basic mechanical, microstructural, and physical properties of different types of composite metal foams is discussed in the first part of the paper. In the second part, some recent studies on high strain rate properties, ballistic performance, radiation attenuation, and thermal properties of composite metal foams are discussed and compared with other bulk and control materials. These properties suggest many potential applications for this novel material in a broad range of engineering structures from ballistic armors to trains', cars', buses', helicopters' crashworthiness systems, and many others such as nuclear casks and thermal insulating units.
61 citations
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TL;DR: The possibilities for manufacturing metal foams or other porous metallic structures are reviewed in this article, where various manufacturing processes are classified according to the state of matter in which the metal is processed, such as solid, liquid, gaseous or ionised.
3,294 citations
30 Sep 1999-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the uniaxial compressive and tensile modulus and strength of several aluminum foams are compared with models for cellular solids, and the closed cell foams have moduli and strength that fall well below the expected values.
Abstract: The uniaxial compressive and tensile modulus and strength of several aluminum foams are compared with models for cellular solids. The open cell foam is well described by the model. The closed cell foams have moduli and strengths that fall well below the expected values. The reduced values are the result of defects in the cellular microstructure which cause bending rather than stretching of the cell walls. Measurement and modelling of the curvature and corrugations in the cell walls suggests that these two features account for most of the reduction in properties in closed cell foams.
479 citations
15 Mar 2000-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the main regularities characterising the effect of scandium on a structure and properties of aluminium alloys have been found and, based on this, principles of making an alloying addition of Scandium to aluminum alloys and the foundations of a technology for production of wrought semiproducts have been formulated.
Abstract: Research works concerning making an alloying addition of scandium to aluminium alloys are carried out for nearly 30 years in Russia. As a result of these studies, main regularities characterising the effect of scandium on a structure and properties of aluminium alloys have been found and, based on this, principles of making an alloying addition of scandium to aluminium alloys and foundations of a technology for production of wrought semiproducts have been formulated.
293 citations
TL;DR: In this paper, the authors determined the minimum height of aluminum foam specimens for compression test at a quasi-static strain rate by comparing the specific yield stress (i.e., yield stress per (relative density),sup 3/2}) of the foam with other data previously reported.
289 citations
30 Nov 2000-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the compressive deformation behavior of open-and closed-cell aluminum foams was assessed under static and dynamic loading conditions, and high strain rate experiments were conducted in a laboratory using a split Hopkinson pressure bar system at strain rates ranging from 400 to 2500 s−1.
Abstract: The compressive deformation behavior of open- and closed-cell aluminum foams was assessed under static and dynamic loading conditions. High strain rate experiments were conducted in our laboratory using a split Hopkinson pressure bar system at strain rates ranging from 400 to 2500 s−1. A strain rate effect was demonstrated for Alporas, a closed-cell aluminum. foam. The strain-rate effect was more significant for a higher density (i.e. 15% relative density) Alporas foam and is attributed to the kinetics of gas flow through the cell structure. The experimental results are discussed in reference to recent findings by other investigators on the dynamic behavior of similar open- and closed-cell aluminum foams.
271 citations