Acoustic emissions analysis of damage in amorphous and crystalline metal foams

A. H. Brothers, D. W. Prine, D. C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Acoustic emission methods are used to investigate the nature and evolution of microfracture damage during uniaxial compression of ductile amorphous and brittle crystalline metal foams made from a commercial Zr-based bulk metallic glass, and to compare this behavior against that of aluminum-based foam of similar structure. For the amorphous foam, acoustic activity reveals evolution of the damage process from diffuse to localized damage through the foam stress plateau region, and reversion back towards diffuse damage in the foam densification region. Accommodation of microfracture by surrounding ductile struts, and significant point contact formation, permit high average compressive strains of ca. 80% in the amorphous foam without macroscopic failure.

Original languageEnglish (US)
Pages (from-to)857-865
Number of pages9
JournalIntermetallics
Volume14
Issue number8-9
DOIs
StatePublished - Aug 2006

Keywords

  • B. Brittleness and ductility
  • B. Glasses, metallic
  • F. Mechanical testing

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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