Cryogenic temperature plasticity of a bulk amorphous alloy

Kyeu Sang Yoon, Mirim Lee, Eric Fleury, Jae Chul Lee

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Unlike crystalline alloys, bulk amorphous alloys exhibit a significantly enhanced plastic strain when tested at cryogenic temperatures. It was observed that both the retarded band propagation and the multiple shear banding are the characteristic features of the shear banding behaviors that are responsible for the enhanced plasticity at cryogenic temperatures. This study explores the retarded band propagation behavior at cryogenic temperatures in terms of the increased viscosity of a material inside a propagating band. The formation of multiple shear bands at cryogenic temperatures is also clarified by evaluating the role played by the cryogenic environment in facilitating the creation of disorder, where local deformation nucleates.

Original languageEnglish
Pages (from-to)5295-5304
Number of pages10
JournalActa Materialia
Volume58
Issue number16
DOIs
Publication statusPublished - 2010 Sep

Keywords

  • Amorphous alloy
  • Band velocity
  • Cryogenic temperature plasticity
  • Serrations
  • Viscosity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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