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 language | English |
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Pages (from-to) | 2459-2463 |
Number of pages | 5 |
Journal | Materials Transactions |
Volume | 48 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2007 Sep |
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