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., ...Daha Fazla

ADVANCED MATERIALS, cilt.19, ss.1957-1963, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 19 Konu: 15
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1002/adma.200602136
  • Dergi Adı: ADVANCED MATERIALS
  • Sayfa Sayıları: ss.1957-1963

Özet

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.