Tailoring thermally induced nano-quasicrystallization and deformation-assisted nanocrystallization for mechanical property improvement in Zr-Al-Ni-Cu-Pd bulk metallic glasses

Junji Saida, Albertus D. Setyawan, Hidemi Kato, Mitsuhide Matsushita, Akihisa Inoue

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The material design tailoring of a synergistic effect of an in-situ nano secondary phase formation and deformation-induced nanocrystallization for improving the mechanical strength and ductility, has been investigated in Zr65Al7.5Ni10Cu17.5-xPdx bulk metallic glasses (BMGs). As-cast Zr65Al7.5Ni 10Cu17.5-xPdx (x = 5-17.5) BMGs have significant ductility in compressive deformation, which is attributed to deformation-induced dynamic nanocrystallization. The 10at% Pd-containing BMG with a low volume fraction of the quasicrystalline (QC) phase of less than 6% exhibits increases in strength and Young's modulus, in addition to a remaining plasticity of ∼5%, compared with the monolithic glassy alloy. Such improvements in the mechanical properties originate from the combination of two effects of in-situ homogeneous nano-QC formation and deformation-induced inhomogeneous nanocrystallization. The present method should be regarded as a new technique for the production of BMGs with high strength and good ductility.

Original languageEnglish
Pages (from-to)2079-2086
Number of pages8
JournalMaterials Transactions
Volume50
Issue number8
DOIs
Publication statusPublished - 2009 Aug 1

Keywords

  • Deformation-induced nanocrystallization
  • Ductility
  • Metallic glasses
  • Nanocomposite
  • Nanostructure
  • Quasicrystals

ASJC Scopus subject areas

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

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