Effects of noble metal additons on plastic deformation of Zr-Cu-Ni-Al based bulk metallic glasses

Tohru Yamasaki, Masahiro Yamada, Kazutaka Fujita, Hidemi Kato, Do Hyang Kim

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Abstract

Zr-Cu-Ni-Al bulk metallic glasses (BMGs) have been limited in practical applications because of their low ductility under tensile and compressive testing conditions. This may be due to the formation of highly localized shear bands during plastic deformation. In this study, effects of Pd, Pt, Au and Ag additions on mechanical properties of Zr-Cu-Ni-Al BMGs have been examined. By the noble metal additions, precipitation of the icosahedral quasicrystal phase (I-phase) in the supercooled liquids was observed. Compression tests were carried out in these BMGs at an initial strain rate of 1 × 10-4 s-1 at room temperature. Especially, in the case of the Au-addition, large plastic deformation was observed and many shear bands were also observed in wide region of the side-surface of the fractured specimens. This may be due to dynamic precipitations of nanocrystalline particles inside the shear bands during compressive deformation that prevent the propagations of the deformation shear bands.

Original languageEnglish
Pages (from-to)230-238
Number of pages9
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume63
Issue number4
DOIs
Publication statusPublished - 2016 Apr

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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