Unusual plasticization for structural relaxed bulk metallic glass

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17 Citations (Scopus)

Abstract

Unusual plasticization for structural relaxed CuZr-based bulk metallic glass (BMG) has been found. Even though thermal-annealing usually leads to unfavorable relaxation-induced embrittlement for most BMGs, this BMG exhibits an improved plasticity after annealing. This behavior is attributed to an evolution of nanolevel heterogeneity for this unstable or heterogeneous BMG. Less initiation of shear bands by structural relaxation and evolution of heterogeneity from thermal-annealing are considered to contribute cooperatively to the plasticity of relaxed glass. This study provides a new viewpoint to improve the mechanical properties of BMGs upon relaxation, in which a microstructural heterogeneity is distributed among a glassy matrix. This finding may also expand the applications of BMGs as promising structural materials because of unusual resistances to annealing-embrittlement.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalMaterials Science and Engineering A
Volume699
DOIs
Publication statusPublished - 2017 Jun 24

Keywords

  • Bulk amorphous alloys
  • Nanolevel heterogeneity
  • Plasticity
  • Structure relaxation

ASJC Scopus subject areas

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

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