Rejuvenation of Zr-based bulk metallic glass matrix composite upon deep cryogenic cycling

Wei Guo, Junji Saida, Mi Zhao, Shulin Lü, Shusen Wu

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The rejuvenation behavior of Ta-rich particle reinforced Zr-based bulk metallic glass matrix composites upon deep cryogenic cycling treatment has been studied. The composite can be rejuvenated resulting in a higher enthalpy of relaxation and lower density. The internal stress generated from both the intrinsic heterogeneity in amorphous matrix and the interfaces between the matrix and Ta-rich phase should contribute to the rejuvenation behavior. The composite structure can generate a 4 times higher internal stress than that from the intrinsic heterogeneity, which causes the more rejuvenated state of the composites compared with the monolithic counterpart. With a higher volume fraction of Ta-rich phase, both the increment in enthalpy of relaxation and free volume between as-cast and thermal treated state increases almost linearly. The rejuvenated samples show better plasticity compared with as-cast counterparts because of more induced free volume.

Original languageEnglish
Pages (from-to)135-138
Number of pages4
JournalMaterials Letters
Volume247
DOIs
Publication statusPublished - 2019 Jul 15

Keywords

  • Amorphous materials
  • Composite materials
  • Cryogenic cycling treatment
  • Rejuvenation

ASJC Scopus subject areas

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

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