Superplasticity and superplastic forming ability of a Zr-Ti-Ni-Cu-Be bulk metallic glass in the supercooled liquid region

G. Wang, J. Shen, J. F. Sun, Y. J. Huang, J. Zou, Z. P. Lu, Z. H. Stachurski, B. D. Zhou

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    86 Citations (Scopus)

    Abstract

    The superplastic deformation behavior and superplastic forming ability of the Zr 41.25Ti 13.75Ni 10Cu 12.5Be 22.5 (at.%) bulk metallic glass (BMG) in the supercooled liquid region were investigated. The isothermal tensile results indicate that the BMG exhibits a Newtonian behavior at low strain rates but a non-Newtonian behavior at high-strain rates in the initial deformation stage. The maximum elongation reaches as high as 1624% at 656 K, and nanocrystallization was found to occur during the deformation process. Based on the analysis on tensile deformation, a gear-like micropart is successfully die-forged via a superplastic forging process, demonstrating that the BMG has excellent workability in the supercooled liquid region.

    Original languageEnglish
    Pages (from-to)209-217
    Number of pages9
    JournalJournal of Non-Crystalline Solids
    Volume351
    Issue number3
    DOIs
    Publication statusPublished - 1 Feb 2005

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