Mechanical properties of a Ni60Pd20P17B3 bulk glassy alloy at cryogenic temperatures

Asahi Kawashima, Yuqiao Zeng, Mikio Fukuhara, Hiroaki Kurishita, Nobuyuki Nishiyama, Hiroyuki Miki, Akihisa Inoue

研究成果: Article査読

55 被引用数 (Scopus)

抄録

Little is known about mechanical properties of bulk glassy alloys (BGAs) at cryogenic temperatures. In this study, we investigated the effects of temperature and strain rate on the mechanical properties of a Ni60Pd20P17B3 BGA. Compression tests were performed at temperatures of 295, 223, 173 and 77 K and at strain rates from 5 × 10-5 to 5 × 10-3 s-1. Measurements of the elastic parameters were also made at temperatures from 91 to 371 K. It is found that both the maximum compressive stress and plastic strain to failure increase with decreasing testing temperature. The Young and shear moduli, and Debye temperature monotonically increase with decreasing temperature, while Poisson's ratio decreases, indicating that the BGA becomes rigid and the effective atomic distance decreases at cryogenic temperatures. The mechanism reflecting the changes in the maximum compressive stress and plastic strain with temperature is discussed.

本文言語English
ページ(範囲)475-481
ページ数7
ジャーナルMaterials Science and Engineering A
498
1-2
DOI
出版ステータスPublished - 2008 12 20

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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