Volume 9, Issue 2 (February 2012)

    Stability of Metallic Glasses: Criteria and Prediction of Ductile-Brittle Transition and Crystallization

    (Received 30 April 2011; accepted 14 November 2011)

    Published Online: 2011

    CODEN: JAIOAD

      Format Pages Price  
    PDF Version 17 $25   ADD TO CART


    Abstract

    A close correlation between the mechanical behavior changes of metal-metalloid glasses and their relaxation spectrum heat emissions has been found. The criteria of crystallization and ductile-brittle transition for these kinds of metallic glasses (MGs) have been established. They correspond to the heat emission balance between the low- and high-temperature parts of the relaxation spectrum. The model of MGs as a system constituting an additive sum of elementary two-level transitions with continuously distributed activation energies is proposed for the analytical description of the relaxation spectrum and its parameters. The methods developed in the approximation of the model permit the determination of the current state of MG materials at an arbitrary temperature, as well as forecasting of their ductile-brittle transition and crystallization according to heat emission alterations of the relaxation spectrum.


    Author Information:

    Zaichenko, S. G.
    I.P. Bardin Central Research Institute for Ferrous Metallurgy,

    Glezer, A. M.
    I.P. Bardin Central Research Institute for Ferrous Metallurgy,

    Filippova, V. P.
    I.P. Bardin Central Research Institute for Ferrous Metallurgy,


    Stock #: JAI103936

    ISSN: 1546-962X

    DOI: 10.1520/JAI103936

    ASTM International is a member of CrossRef.

    Author
    Title Stability of Metallic Glasses: Criteria and Prediction of Ductile-Brittle Transition and Crystallization
    Symposium , 0000-00-00
    Committee C14