Dynamic mechanical relaxation behavior of Zr35Hf17.5Ti5.5Al12.5Co7.5Ni12Cu10 high entropy bulk metallic glass

L. T. Zhang, Y. J. Duan, T. Wada, H. Kato, J. M. Pelletier, D. Crespo, E. Pineda, J. C. Qiao

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Non-equiatomic high entropy bulk metallic glasses were reported recently and show unique mechanical and physical properties. Dynamic mechanical relaxation behavior of Zr35Hf17.5Ti5.5Al12.5Co7.5Ni12Cu10 high entropy bulk metallic glass was investigated by dynamic mechanical analysis (DMA) and the mechanical spectra could be well described by the quasi-point defects (QPD) theory. Compared to typical metallic glasses, the intensity of the β relaxation of Zr35Hf17.5Ti5.5Al12.5Co7.5Ni12Cu10 high entropy bulk metallic glass is lower due to the sluggish diffusion. At the same time, the correlation factor χ is higher than that of conventional metallic glasses and this is ascribed to the high configuration entropy. In parallel, physical aging below the glass transition temperature leads to a decrease of atomic mobility, caused by a decrease of the concentration of defects.

Original languageEnglish
Pages (from-to)248-255
Number of pages8
JournalJournal of Materials Science and Technology
Volume83
DOIs
Publication statusPublished - 2021 Aug 30

Keywords

  • High entropy bulk metallic glass
  • Mechanical relaxation
  • Physical aging
  • Quasi-point defects

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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