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 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 15
  • Publication Date: 2007
  • Doi Number: 10.1002/adma.200602136
  • Journal Name: ADVANCED MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1957-1963
  • Istanbul Technical University Affiliated: No

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.