Elasticity and anelasticity of metallic glass near the glass transition temperature

K. Tanaka, T. Ichitsubo, E. Matsubara

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Resonance ultrasound spectroscopy with piezo-electric transducers were used to probe the temperature dependence of elastic and anelastic properties and the accelerated crystallization by mechanical vibrations of a Pd-based bulk metallic glass with the glass transition temperature of approximately 300 °C. Similarly to conventional crystalline metals, the elastic stiffness constants monotonically decrease upon heating. However, the ratio of changes in the shear and bulk moduli (ΔG/ΔB) from 20 to 290 °C is 7.5, which is much larger than that of conventional crystalline metals of about 2. The internal friction increases as the temperature increases, but is nearly constant in the supercooled liquid state. After annealing for 180 min at 320 °C, the elastic constants increase about 5-10%; indicating that partial crystallization occurs during the heat treatment. In addition, this work clearly implies that applying pure ultrasound vibrations in the supercooled liquid state accelerates the crystallization of bulk metallic glass.

本文言語English
ページ(範囲)278-282
ページ数5
ジャーナルMaterials Science and Engineering A
442
1-2 SPEC. ISS.
DOI
出版ステータスPublished - 2006 12 20
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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