Microstructure and Compression Behavior of Cenosphere Filled Aluminum Syntactic Foams

Qiang Zhang; Gaohui Wu

doi:10.4028/www.scientific.net/MSF.706-709.704

Paper Titles

Forming Potential of Steel/Polymer/Steel Sandwich Composites with Local Plate Inserts
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Mechanical Properties, Aging Behavior and Microstructure Evolution of Mg-Nd-Zn-Zr Based Magnesium Matrix Composite Reinforced with Alumina Fibers
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Functionally Graded Biocomposites
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Fabrication of Vapor Grown Carbon Fiber Reinforced Aluminum Composites by Spark Sintering
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Microstructure and Compression Behavior of Cenosphere Filled Aluminum Syntactic Foams
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Fabrication of Bulk Functionally-Graded Syntactic Foams for Impact Energy Absorption
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Nanofragmentation Controlled by a Shock-Induced Phase Transition in Mullite Related Ceramics and its Application
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Comparison of Experimental and Numerical Results for the Quasi-Static and Dynamic Tensile Behaviour of a Commercial Ti6Al4V Alloy as a Function of Initial Crystallographic Texture
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Controlling of Distribution of Mechanical Properties in Functionally-Graded Syntactic Foams for Impact Energy Absorption
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Microstructure and Compression Behavior of Cenosphere Filled Aluminum Syntactic Foams

Abstract:

Aluminum syntactic foams were fabricated by pressure-inﬁltrating liquid pure aluminum into packed preforms of cenosphere fly ash. The morphology, true density and porosity of fly ash microballoons were characterized. The microstructure of the syntactic foams demonstrated uniform distribution of the microballoons in the aluminum matrix and seldom infiltration of cenosphere fly ash. These foams were subjected to quasi-static uniaxial compression tests and behaved like high strength aluminum foams under compressive deformation, exhibiting an extended plateau region in the stress–strain curves. With the decreasing of fly ash diameter, the plateau stress and absorbed energy of the syntactic foams increased. X-ray microcomputed tomography was used to examine the foam microstructures after interrupted compression and reveal the damage evolution. The current work provides a better understanding on the structure and mechanical properties of aluminum matrix syntactic foams.