Annealing-induced devitrification behavior of a Ti47.4Zr 5.3Ni5.3Cu42.0 glassy alloy

Ichiro Seki, Mikio Fukuhara, Asahi Kawashima, Hisamichi Kimura, Akihisa Inoue

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We have investigated devitrification behavior, accompanied by glass transition and precipitation of crystallites, as a function of annealing temperature and time for a Ti47.4Zr5.3Ni 5.3Cu42.0 glassy alloy sheet, together with embrittlement behavior using bending fracture strain test. From kinetic analysis in one DSC profile under a constant heating rate, we can easily estimate the devitrification with temperature and time upon annealing. The glassy alloy became brittle during progressive devitrification in accordance with kinetic estimation. In sharp contrast with a Zr55Al10Ni 5Cu30 glassy alloy, all the precipitations of crystallites (Cu4Ti3, Ti and CuTi) occur above glass transition temperature (Tg). We found that the Ti-based glassy alloy has large structurally and thermally stable area, which does not brittle up to 1.10 × 10 4 s at 650 K and 1.29 × 1010 s at 600 K, by experiment and kinetic estimation, respectively.

Original languageEnglish
Pages (from-to)2459-2463
Number of pages5
JournalMaterials Transactions
Volume48
Issue number9
DOIs
Publication statusPublished - 2007 Sep 1

Keywords

  • Crystallization
  • Ductile/brittle behavior
  • Frequency factor
  • Glass transition
  • Kinetic analysis

ASJC Scopus subject areas

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

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