Yielding of Metallic Glass Foam by Percolation of an Elastic Buckling Instability

Real‐time X‐ray microtomography is used to study the underlying mechanisms of the yielding and collapse of a closed‐cell metallic glass foam (see figure). Intercellular and intracellular deformations upon compressive loading are examined in situ. A shear‐stability analysis reveals that glassy foams...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2007-08, Vol.19 (15), p.1957-1962
Main Authors: Demetriou, M. D., Hanan, J. C., Veazey, C., Di Michiel, M., Lenoir, N., Üstündag, E., Johnson, W. L.
Format: Article
Language:English
Subjects:
Foams
Glass foams
Glasses
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Summary:Real‐time X‐ray microtomography is used to study the underlying mechanisms of the yielding and collapse of a closed‐cell metallic glass foam (see figure). Intercellular and intracellular deformations upon compressive loading are examined in situ. A shear‐stability analysis reveals that glassy foams obey the same universal yield criterion as zero‐temperature glasses, suggesting a link between the floppy modes in a glass and the buckling instabilities in a stochastic cellular structure.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200602136