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- W2029479866 abstract "A359–Al2O3 particle composite foams reinforced with 5, 10 and 15 vol.% of Al2O3 particles were synthesized successfully by direct foaming method. The structures, compressive behaviors and energy absorption capabilities of these foams were studied. Macrostructures of the produced foams revealed a roughly equiaxed polyhedral closed cell structure. The composite foams had relatively uniform cell size and distribution in comparison to that of the unreinforced A359 foam. The microstructures of the composite foams depicted a uniform distribution of the Al2O3 particles in the cell wall and good interfacial bonding between the Al2O3 particle and A359 matrix alloy. The compressive stress–strain curves of the composite foams exhibited typical characteristics of plastic foams, where the compressive curves rose smoothly with the increase of the strain and no stress oscillations occurred in the collapse region of the foams throughout the tests. The yield stress of the composite foams increased almost linearly with increasing the volume fraction of Al2O3 particles. Also, with increasing the volume fraction of the Al2O3 particles from 5 to 15 vol.%, the plateau and plastic stress as well as Young's modulus of the composite foams increased significantly. The strain-hardening exponent of the unreinforced A359 foam was found to be higher than that of the foam composites. However, increasing the volume fraction of the Al2O3 particles from 5 to 15% caused an increasing in the strain-hardening exponent of the foam composites. The composite foams containing 5 or 10 vol.% of Al2O3 particle showed almost identical energy absorbing capacity. However, further increasing in the volume fraction of the Al2O3 particles to 15 vol.% resulted in increasing the energy absorption by about 100% due to the higher plateau stress of this foam." @default.
- W2029479866 created "2016-06-24" @default.
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- W2029479866 date "2009-11-01" @default.
- W2029479866 modified "2023-09-26" @default.
- W2029479866 title "Compressive response and energy absorption of foamed A359–Al2O3 particle composites" @default.
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- W2029479866 doi "https://doi.org/10.1016/j.jallcom.2009.07.013" @default.
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