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Relation of Cell Uniformity and Mechanical Property of a Close Cell Aluminum Foam

Authors

  • Wang Deqing

    Corresponding author
    1. Laboratory for Railway, Dalian Jiaotong University, Dalian, Liaoning 116028, P. R. China
    • Laboratory for Railway, Dalian Jiaotong University, Dalian, Liaoning 116028, P. R. China
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Abstract

Samples of closed-cell aluminum foams are prepared by air-foaming aluminum melt, and two techniques are employed to obtain uniform and non-uniform aluminum foams under identical processing conditions. Experiment results show that the uniform-celled aluminum foam presents an overall 25% improvement of the yield strength over the one for the non-uniform cells with the same density, and a very precise relation between yield strength and density is obtained for the uniform-celled aluminum foam. The cell size uniformization does not affect elastic modulus significantly, and the uniformity of the aluminum foam cells decreases the energy absorption ability.

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