Tensile plastic deformation of Zr70Ni16Cu 6Al8 bulk metallic glass at cryogenic temperature

Hitoo Tokunaga, Yuhei Nitta, Akinori Shirota, Kazutaka Fujita, Yoshihiko Yokoyama, Tohru Yamasaki, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Zr70Ni16Cu6Al8 bulk metallic glass (BMG) exhibited clear tensile plastic deformation at room temperature. The tensile plastic deformation was induced by the specimen sliding along one main shear band, which completely penetrated the specimen. Also, it was surmised that there is a viscous medium in a main shear band. Therefore, it can be considered that the viscous medium in the shear band plays an important role in the mechanical properties of the BMG under tensile loading. In this study, tensile tests of the Zr70Ni16Cu6Al8 BMG were carried out at the temperatures of 293 and 133 K to investigate the effect of the viscous medium in the shear band on the mechanical properties of the BMG. As the results, it was found that the strength of the BMG at 133 K was 21% higher than that at 293 K. Furthermore, at 133 K, highly denser, longer, and many branching and curving shear bands were observed over a wide area of the specimen surface in comparison with those at 293 K. In addition, at 133 K, a few main shear bands were observed on the fracture surface.

Original languageEnglish
Pages (from-to)919-923
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume73
Issue number12
DOIs
Publication statusPublished - 2009 Dec

Keywords

  • Bulk metallic glass
  • Cryogenic temperature
  • Shear band
  • Tensile plastic deformation
  • Viscosity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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