Dynamic compressive behavior of aluminum matrix syntactic foam and its multilayer structure

The metallic foams have lower density, and important physical, mechanical, thermal and acoustic properties, has been highlighted in its use in innovative technologies. As a subgroup of the class of metallic foams, the syntactic metallic foams which consists of the addition of hollow ceramic balloons in a metallic matrix in aluminum Al-5052 by process of tixoinfiltration. The microstructure was studied by optical and electron microscopy extended by energy-dispersive X-ray spectrometry, while the basic mechanical properties were mapped by standardized compression tests. Therefore, a syntactic foam design was developed in this work, where we obtained a 30% reduction in density and a reasonable increase in hardness due to the homogeneous dispersion of the ceramic balloons

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

Materials Research ◽

10.1590/1980-5373-mr-2020-0381 ◽

2021 ◽

Vol 24 (2) ◽

Author(s):

Çağın Bolat ◽

Gökhan Bilge ◽

Ali Gökşenli

Keyword(s):

Heat Treatment ◽

Syntactic Foam ◽

Aluminum Matrix ◽

Compression Behavior

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Effect of Layer Thickness in Layered Aluminum Matrix Syntactic Foam

Materials ◽

10.3390/ma12244172 ◽

2019 ◽

Vol 12 (24) ◽

pp. 4172 ◽

Cited By ~ 1

Author(s):

Chenhao Qian ◽

Chen Liang ◽

Ziyang He ◽

Weixi Ji

Keyword(s):

Energy Absorption ◽

Impact Energy ◽

Syntactic Foam ◽

Aluminum Matrix ◽

Peak Stress ◽

Impact Response ◽

Syntactic Foams ◽

Layer Number ◽

Failure Propagation ◽

The Impact

This work experimentally investigates the effect of layered structure on the static and impact response of a new layered syntactic foam developed for impact energy absorption. The layered syntactic foam had the same density of 1.6 g/cm3 and the same components of 50% large spheres (L) and 50% small spheres (S) with different structures from two layers to five layers. The impact response and energy absorption were investigated by drop-weight impact tests. Under static loading, more layers led to higher yield stress and lower energy absorption. There were three types of progressive failures of layered syntactic form under impact loading. The failure propagation was examined and found to be dependent on the layer number and impact energy. Interestingly, layered syntactic foam absorbed more energy than both of its components in terms of ductility. The ductility of layered syntactic foam decreased with the increase in layer number. The peak stress of layered syntactic foam increased with the increase in layer number. Two-layered syntactic foam LS had the highest ductility under 60 J/g impact, as well as an energy absorption of 35 J/g, compared to other layered syntactic foams. Specifically, its component L had a ductility under 70 J/g and an energy absorption of 25 J/g, while component S had a ductility under 10 J/g and an energy absorption of 10 J/g.

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Axial and radial compressive properties of alumina-aluminum matrix syntactic foam filled thin-walled tubes

Composite Structures ◽

10.1016/j.compstruct.2019.111197 ◽

2019 ◽

Vol 226 ◽

pp. 111197 ◽

Cited By ~ 13

Author(s):

Mingming Su ◽

Han Wang ◽

Hai Hao

Keyword(s):

Syntactic Foam ◽

Aluminum Matrix ◽

Compressive Properties ◽

Foam Filled ◽

Thin Walled

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Synthesis and Characterization of Hollow Glass Sphere Containing Aluminum Syntactic Foam by Spark Plasma Sintering and Hot Pressing

Metals ◽

10.3390/met9121266 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1266

Author(s):

Yong Guk Son ◽

Young Cheol Lee ◽

Sung Su Jung ◽

Han Sang Kwon ◽

Wookjin Lee ◽

...

Keyword(s):

Spark Plasma Sintering ◽

Hot Pressing ◽

Volume Fraction ◽

Hollow Spheres ◽

Syntactic Foam ◽

Aluminum Matrix ◽

Sintering Process ◽

Pressing Method ◽

Plasma Sintering ◽

Spark Plasma

The effect of sintering process on the microstructure and the mechanical properties of aluminum syntactic foam were investigated in this study. Two different sintering processes of spark plasma sintering and hot pressing were used. Glass hollow spheres with a size of 50–80 μm was used to fabricate the foams having various volume fractions of the spheres in the range of 10–30%. Microstructural analysis revealed that the glass hollow spheres were uniformly distributed in the aluminum matrix, both in the spark plasma sintered and hot pressed ones. As the volume fraction of the spheres increased from 10 to 30%, the density, micro-hardness and compressive strength of the foams were decreased. In comparison to the foams fabricated by hot pressing method, the spark plasma sintered foams had slightly lower density and mechanical strength. In nanoindentation study, it was found that the aluminum matrix in the foam prepared by the spark plasma sintering process had lower strength than foam prepared by the hot pressing process. This is likely because of shorter sintering time used in the spark plasma sintering process than the hot pressing.

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