Compressive Behavior of Aluminium Foams Prepared by Powder Metallurgy Method

Li Wei; Csaba Sinka; Simon Lawes; Tao Han

doi:10.4028/www.scientific.net/AMM.157-158.600

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 157-158Compressive Behavior of Aluminium Foams Prepared...

Compressive Behavior of Aluminium Foams Prepared by Powder Metallurgy Method

Abstract:

The compression behavior of closed cell aluminum foams with different density has been examined. Stress-strain curves were obtained. The microstructure evaluation of cell walls was investigated using X-ray computer tomography. A series of images of internal microstructures were given, the structural deformation evolution was analyzed. The images of cell wall evolution shown that crack appeared in cell wall after a small deformation of elastic deformation. As the compression proceeded, further cracks occur and some of the cell walls fracture. The fracture area become expanded, a part of dislocation on the sample side is formed. As the fracture area spreads, some regions become dense. The stress-strain curves showed brittle characteristics. As the relative density increases, yield strength and elastic modulus of aluminum foams increased. The best fit lines are obtained, where, is 0.97 and 0.2 respectively.

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Periodical:

Applied Mechanics and Materials (Volumes 157-158)

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600-603

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.157-158.600

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Online since:

February 2012

Authors:

Li Wei, Csaba Sinka, Simon Lawes, Tao Han

Keywords:

Aluminum Foam, Cell Wall, Compression, Microstructure Evaluation

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