Plasticity and damage in cellular amorphous metals

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

Compressive mechanical properties of low-density, open-cell Zr-based bulk metallic glass foams processed by the salt replication method are investigated as a function of relative density and pore size in the ranges 14-28% and 150-355 μm, respectively. Scaling behaviors for strength and stiffness are discussed in the context of models developed for conventional metal foams, and appropriate modifications presented where necessary. Deformation and damage features not addressed by such models are then discussed in terms of the unique conditions allowing ductility in amorphous metal foams. It is shown that despite a small number of brittle uniaxial strut failures, ductile deformation by strut bending predominates in the foams, with the result that all but the densest foam could be compressed to a nominal strain in the vicinity of 80% without macroscopic fracture.

Original languageEnglish (US)
Pages (from-to)4427-4440
Number of pages14
JournalActa Materialia
Volume53
Issue number16
DOIs
StatePublished - Sep 2005

Keywords

  • Foams
  • Mechanical properties
  • Metallic glasses
  • Shear bands
  • Vit106

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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