Stability of medium range order in Al-based metallic glass compacted by severe plastic deformation

Zs Kovács, P. Henits, L. K. Varga, E. Schafler, Á Révész

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

High pressure torsion has successfully been applied to produce low-porosity, bulk specimens from Al-based metallic glass ribbons (Al 85Y8Ni5Co2, Al85Ce 8Ni5Co2 and Al85Gd 8Ni5Co2). The compacted disks possess higher hardness than the original glass and have substantial glass fraction with nanocrystalline precipitations. Mechanical and thermal impacts have only minor effects on the glassy structure as demonstrated by the stability of the X-ray diffraction halo positions. Unchanged halos reveal that medium range order is a key characteristic of the amorphous state.

Original languageEnglish
Pages (from-to)5-9
Number of pages5
JournalJournal of Alloys and Compounds
Volume561
DOIs
Publication statusPublished - Jun 5 2013

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Keywords

  • Al-based
  • Medium range order
  • Metallic glass
  • Structure

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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