Hydrogen-induced internal friction of Zr-based bulk glassy alloys in a rod shape above 90 K

M. Hasegawa, K. Kotani, S. Yamaura, H. Kato, I. Kodama, A. Inoue

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Hydrogen-induced internal friction of Zr65Al 7.5Ni10Cu17.5 bulk glassy alloys in a short rod shape (1.5mm in diameter, 44mm in length) have been investigated above 90K using a vibrating reed technique. A quite broad and asymmetric peak is observed around 240K (H=2.21at.%) in the temperature dependence of internal friction. Strain amplitude dependence of internal friction of Zr63.57Al 7.32Ni9.79Cu17.11H2.21 have been also measured at about the peak temperature and room temperature. It is found that the internal frictions at both temperatures are independent of the strain amplitude. Effects of hydrogen concentration (H=0.24-2.21at.%) on the temperature dependence of internal friction have been also clarified. The peak temperature decreases with increasing hydrogen concentration and the peak internal friction increases almost linearly. These results are compared with the reported results of Zr-Al-Ni-Cu-Pd bulk glassy alloys and discussed from the viewpoints of local structure of the Zr-based glassy alloys.

Original languageEnglish
Pages (from-to)221-227
Number of pages7
JournalJournal of Alloys and Compounds
Volume365
Issue number1-2
DOIs
Publication statusPublished - 2004 Feb 25

Keywords

  • Bulk glassy alloy
  • Damping material
  • Hydrogen
  • Internal friction
  • Local structure

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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