Low temperature mechanical properties of bulk metallic glasses

Shin Takeuchi, Tomohiro Kakegawa, Tatsuo Hashimoto, An Pang Tsai, Akihisa Inoue

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Compression tests have been performed for bulk metallic glasses of La55Al25Ni20 (L-glass) and Zr41Ti15Ni12Cu11Be21 (Z-Glass) at temperatures from 4.2 K up to above the glass transition temperature. Shear fracture stresses are scattered between 0.75 GPa and 1.2 GPa in the in the L-glass, and between 1.3 GPa and 2.2 GPa in the Z-glass with a tendency of decrease towards both higher and lower temperatures from 77 K in L-glass and from 300 K in Z-glass. The normalized shear fracture stresses with respect to the Young's modulus are around 0.02 in both glass The micro-plastic strain measured with the strain gauge for the L-glass is about 0.2% at the shear fracture stress at room temperature, decreases with decreasing temperature and is of the order of 0.01% below 77 K. The mechanism that determines the shear fracture stress is discussed.

    Original languageEnglish
    Pages (from-to)1443-1447
    Number of pages5
    JournalMaterials Transactions, JIM
    Volume41
    Issue number11
    DOIs
    Publication statusPublished - 2000 Nov

    ASJC Scopus subject areas

    • Engineering(all)

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