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

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)475-481
Number of pages7
JournalMaterials Science and Engineering A
Volume498
Issue number1-2
DOIs
Publication statusPublished - 2008 Dec 20

Keywords

  • Compressive stress
  • Cryogenic temperature
  • Elastic parameter
  • NiPdPB bulk glassy alloy
  • Plastic strain

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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