Preparation of a Wide Zr55Al10Ni5Cu 30 metallic glass sheet by a twin-roller type casting method and its mechanical properties

Ichiro Seki, Kimio Wakoh, Asahi Kawashima, Hisamichi Kimura, Akihisa Inoue

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    5 Citations (Scopus)

    Abstract

    Wide Zr55Al10Ni5Cu30 metallic glassy alloy sheets were successfully produced by a twin-roller casting method. The glassy alloy sheet of 12 mm in width, 0.19 mm in thickness and 650 mm in length has flat surfaces with highly white luster. The exothermic heat of the sample keeps almost constant up to 108 ks at 663 K, decreases gradually with increasing time and becomes almost zero at 1210 ks, in agreement with distinct precipitation of crystallites identified as CuZr2 and Al 5Ni3Zr2. Mechanical properties, which are tensile stress, fracture strain and hardness, were measured for the samples annealed at various temperatures for different times. At high annealing temperatures slightly above and below Tg, the glassy alloy suffers embrittlement by the beginning of crystallization. The glassy alloys annealed at the temperatures much lower than Tg and Tx become brittle after prolonged annealing, in spite of the fact mat they show the glassy structure by XKD and DSC.

    Original languageEnglish
    Pages (from-to)1926-1929
    Number of pages4
    JournalMaterials Transactions
    Volume47
    Issue number8
    DOIs
    Publication statusPublished - 2006 Aug

    Keywords

    • Annealing
    • Embrittlement
    • Hardness
    • Tensile fracture strength
    • Twin-roller casting method
    • ZrAlNiCu metallic glass

    ASJC Scopus subject areas

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

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