Yielding of metallic glass foam by percolation of an elastic buckling instability


Demetriou M. D. , HANAN J. C. , VEAZEY C., DI MICHIEL M., LENOIR N., UESTUENDAG E., ...More

ADVANCED MATERIALS, vol.19, no.15, pp.1957-1963, 2007 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 15
  • Publication Date: 2007
  • Doi Number: 10.1002/adma.200602136
  • Title of Journal : ADVANCED MATERIALS
  • Page Numbers: pp.1957-1963

Abstract

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.