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, sa.15, ss.1957-1963, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 15
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1002/adma.200602136
  • Dergi Adı: ADVANCED MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1957-1963
  • İstanbul Teknik Üniversitesi Adresli: Hayır

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.