Characteristic of dynamic mechanical relaxation processes in Cu46Zr46Al8 and La43.4Ce18.6Ni24Al14 metallic glasses

D. S. Yang, J. Wang, J. M. Pelletier, K. K. Song, J. C. Qiao

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Dynamic mechanical relaxation processes are very important to understand physical and mechanical properties of metallic glasses. In the current work, dynamic mechanical behaviors of La43.6Ce18.4Ni24Al and Cu46Zr46Al8 metallic glasses were investigated by mechanical spectroscopy. Unlike Cu46Zr46Al8 metallic glass, La43.6Ce18.4Ni24Al14 glassy system shows an evident slow β relaxation process. In addition, physical aging below the glass transition temperature Tg induces a reduction of intensity of the β relaxation. Evolution of the concentration of “defects” of metallic glasses was analyzed in the framework of Interstitialcy theory. Our research provides a new insight on understanding of the correlation between the structural heterogeneity and β relaxation of metallic glasses.

Original languageEnglish
Article number161392
JournalJournal of Alloys and Compounds
Volume887
DOIs
StatePublished - 20 Dec 2021

Keywords

  • Dynamic mechanical relaxation
  • Metallic glass
  • Physical aging
  • Secondary relaxation
  • Structural heterogeneity

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