Plastic deformation of Zr-based bulk metallic glasses under nanoindentation

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Abstract

The plastic deformation of two Zr-based bulk metallic glasses (BMGs), Zr55Cu30Ni5Al10and Zr69.5Cu12Ni11Al7.5, was investigated by instrumented nanoindentation over a broad range of loading rates. It was found that the plastic flow of the two BMGs exhibited conspicuous serrations at low loading rates. The serrations, however, became less prominent as the rate of indentation increased. AFM showed a significant pile-up of materials around the indents, indicating that a highly localized plastic deformation occurred under nanoindentation. The mechanism governing the plastic deformation in BMGs was tentatively discussed in terms of the mode of strain-induced free volume.
Original languageEnglish
Pages (from-to)3090-3094
Number of pages5
JournalMaterials Letters
Volume59
Issue number24-25
DOIs
Publication statusPublished - 1 Oct 2005

Keywords

  • Bulk metallic glasses
  • Nanoindentation
  • Plastic deformation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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