Compressive mechanical properties of low-cost, aluminium matrix syntactic foams

Orbulov, Imre Norbert; Szlancsik, Attila; Kemény, Alexandra; Kincses, Domonkos Balázs

doi:10.1016/j.compositesa.2020.105923

Cited by 86 publications

(33 citation statements)

References 53 publications

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“…Fiedler et al 25 reported that thermal treatment improved mechanical response of A356 syntactic foam at cryogenic temperature (-196°C). Orbulov et al 26 recommended expanded clay particles for commercial purity Al and AlSi9MgMn matrices to try low-cost and useful alternative to the widely used hollow spheres, and emphasized that T6 treatment enhanced mechanical properties. Fiedler et al 27 fabricated functionally graded A356/EP syntactic foam.…”

Section: Introductionmentioning

confidence: 99%

An Investigation on the Effect of Heat Treatment on the Compression Behavior of Aluminum Matrix Syntactic Foam Fabricated by Sandwich Infiltration Casting

2021

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In this research, syntactic foams including Al-7075 matrix and 2-4 mm low-cost pumice particles were manufactured via a novel casting method called as sandwich infiltration. According to physical evaluations, thanks to extremely porous structure of pumice, density values of the fabricated foams varied between 1.42 and 1.61 g/cm 3. Porosity values were between 40.62% and 47.39%. Microstructural observations showed that there was a perfect infiltration between Al matrix and pumice particles because of correct process optimization (process pressure of 0.1 MPa, matrix melting temperature of 720°C and filler pre-temperature of 500°C). Furthermore, T6 treatment was applied to samples to comprehend effect of the aging on mechanical properties. The results indicated that there was an affirmative relation between the heat treatment and quasi-static compressive properties of the fabricated foams. The highest compressive strength, plateau stress and energy absorption values were measured as 64.4 MPa, 74.3 MPa and 34 MJ/m 3 for heat treated samples. It was also observed that although the highest energy efficiency of 0.89 was calculated for heat treated sample, there was no relation between the heat treatment and efficiency. As for failure modes, as-cast samples exhibited ductile barreling characteristic whereas T6 treated foams indicated brittle v-shape fracture.

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Section: Introductionmentioning

confidence: 99%

An Investigation on the Effect of Heat Treatment on the Compression Behavior of Aluminum Matrix Syntactic Foam Fabricated by Sandwich Infiltration Casting

2021

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“…It was observed that ECn exhibited brittle behavior under compressive loads, as was expected based on their ceramic composition. Previous studies [ 20 , 21 , 22 ] informed that beds of low thicknesses of these fillers can be successfully infiltrated through a maximum load of 1000 N without compromising the structural integrity of nodules. Thus, the infiltration stopping sensor was calibrated to stop the process when the load cell reaches this value.…”

Section: Resultsmentioning

confidence: 99%

“…Diverse research groups, such as those of Bonabi, Puga, and Orbulov [ 20 , 21 , 22 , 23 ], have analyzed ASF embedding expanded clay particles (EC, silicon y alumina at 50 wt% and 15 wt%, respectively). The behavior of ASF constituted by AlSi5Cu1Mg and EC of 6 to 8 mm in diameter was studied, and a compressive stress and absorption energy capacity of 35.9 MPa and 18 MJ/m 3 was reached [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…Mechanical properties in the Q-S regime ranged from 22.3 to 83.1 MPa in compressive stress, 17.0–95.6 MPa for stress plateau, 40–50% of densified, and 8.9–48.1 MJ/m 3 of energy absorption capacity. Samples tested as-cast and embedding high-size fillers exhibited lower values [ 22 ]. Orbulov et al showed that using EC nodules could reduce economic costs and potentially synthesize ASFs for the transport industry [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

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New Aluminum Syntactic Foam: Synthesis and Mechanical Characterization

et al. 2022

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Metal matrix syntactic foams (MMSF) are advanced cellular materials constituted by a system of a minimum of two phases, in which a dispersion of hollow particles is embedded by a continuous metal matrix. The incorporation of porous fillers favors the development of low-density materials with exceptional behavior for damping vibrations, impacts, and blast effects, shielding acoustic, thermal, and electromagnetic energies. There are three main techniques to produce them: infiltration casting technique (ICT), stir casting technique (SCT), and powder metallurgy technique (P/M). The first two techniques are used for embedding filler into lower melting point metallic matrices than fillers, in contrast to P/M. The present study demonstrates the feasibility of producing MMSF with components of similar melting points by ICT. The fillers were synthesized in-situ with aluminum and a natural foaming agent from wastes of Spanish white marble quarries. These novel aluminum syntactic foams (ASF) were mechanically characterized following the ISO-13314 and exhibited a porosity, plateau stress, and energy absorption capacity of 41%, 37.65 MPa, 8.62 MJ/m3 (at 35% of densification), respectively. These properties are slightly superior to equal porosity LECA ASF, making these novel ASF suitable for the same applications as LECA-ASF.

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“…As a class of multicomponent systems, the overall performance of syntactic foam is determined by the property of matrix and fillers as well as their interfacial interaction. 9–14 Therefore, two aspects of measures can be taken to achieve the above targets, which comprise the matrix material selection and the fillers optimization.…”

Section: Introductionmentioning

confidence: 99%