Effect of the compositional modulation on the plasticity of amorphous alloys: Shear localization viewpoint interpretation

Mi Rim Lee, Kyoung Won Park, Hyun Je Sa, Jae-chul Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Experiments have demonstrated that a moderate amount of Be added to Zr 57.5Cu 38.3Al 4.2 amorphous alloy enhances the plasticity of the alloy. In particular, Zr 54Cu 36Al 4Be 6 alloy exhibited 19% of strain to fracture along with a strength exceeding 2 GPa. Energy dispersive x-ray spectroscopy conducted on the Zr 54Cu 36Al 4Be 6 alloy exhibited the presence of compositional modulation, indicating that nm-scale phase separation had occurred at local regions. In this study, the role played by the nm-scale phase separation on the plasticity was investigated in terms of structural disordering, structural softening and shear localization in order to better understand the structural origin of the enhanced plasticity shown by the developed alloy.

Original languageEnglish
Pages (from-to)687-693
Number of pages7
JournalJournal of Korean Institute of Metals and Materials
Volume47
Issue number11
Publication statusPublished - 2009 Dec 1

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Keywords

  • Amorphous alloy
  • Phase-separation
  • Plasticity
  • Shear localization
  • Structural disordering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Modelling and Simulation

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