Volume 2, Issue 10 (November 2005)

    Deformation Mechanism Maps of Unirradiated and Irradiated V-4Cr-4Ti

    (Received 11 June 2004; accepted 18 April 2005)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    This paper addresses various deformation mechanisms of unirradiated and irradiated V-4Cr-4Ti in terms of Ashby-type deformation maps. Tensile tests were carried out in the temperature range of 950–1150°C at strain rates of 10−3, 10−4, and 10−5 s−1. In addition, published tensile data and thermal creep data before and after irradiation were analyzed to provide further information about the materials' deformation behavior. The extensive tensile database for V-4Cr-4Ti was used to determine the key material parameters in physically-based constitutive equations. The resultant constitutive equations were employed to construct the Ashby deformation mechanism maps for unirradiated and irradiated V-4Cr-4Ti. Using the data analysis from the tensile tests, deformation map predictions at slow strain rates were obtained and verified by comparison with the experimental creep results. The methodology was successful in identifying the operating deformation mechanisms for a given temperature, stress, or strain rate condition. The study examines the limitations of extending creep data and analysis into new operating regimes, particularly where different deformation mechanisms are involved. The application of deformation mechanism maps in creep testing and data analysis is discussed.


    Author Information:

    Li, M
    Postdoctoral Research Associate, Oak Ridge National Laboratory, Oak Ridge, TN

    Zinkle, SJ
    Group Leader, Oak Ridge National Laboratory, Oak Ridge, TN


    Stock #: JAI12462

    ISSN: 1546-962X

    DOI: 10.1520/JAI12462

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    Author
    Title Deformation Mechanism Maps of Unirradiated and Irradiated V-4Cr-4Ti
    Symposium Effects of Radiation on Materials: 22nd International Symposium, 2004-06-10
    Committee E10