Influence of Neutron Irradiation on Energy Accumulation and Dissipation during Plastic Flow and Hardening of Metallic Polycrystals

    Volume 7, Issue 1 (January 2010)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 21 January 2010

    Page Count: 10


    Toktogulova, D. A.
    The Institute of Nuclear Physics, NNC RK, Almaty,

    Gusev, M. N.
    The Institute of Nuclear Physics, NNC RK, Almaty,

    Maksimkin, O. P.
    The Institute of Nuclear Physics, NNC RK, Almaty,

    Garner, F. A.
    Pacific Northwest National Laboratory, Richland, WA

    (Received 13 October 2008; accepted 1 October 2009)

    Abstract

    Deformation-calorimetric experiments have been performed on specimens of Armco iron, pure nickel, and two austenitic chromium-nickel alloys: 12Cr18Ni10Ti and 03Cr20Ni45Mo4Nb, each tested in both unirradiated and irradiated conditions. It has been shown that for neutron-irradiated 12Cr18Ni10Ti stainless steel and also for nickel and Armco iron, the latent energy (Es) versus σ curves shift towards lower values of Es, and these curves progressively lose their parabolic appearance that is typical for unirradiated metals and alloys. It has also been shown experimentally that “excess heat” is measured when stored energy associated with radiation-produced defect agglomerates is released during their annihilation in formation of defect-free channels. In effect more energy in released than the mechanical energy supplied externally to cause deformation of the specimen. When post-irradiation annealing is used to reduce the concentration of defect agglomerates, the excess energy phenomenon disappears.


    Paper ID: JAI102175

    DOI: 10.1520/JAI102175

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    Author
    Title Influence of Neutron Irradiation on Energy Accumulation and Dissipation during Plastic Flow and Hardening of Metallic Polycrystals
    Symposium Presented at the ASTM 24th Symposium on Effects of Radiation on Nuclear Materials and the Nuclear Fuel Cycle, 2008-06-26
    Committee E10