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    Dimensional Characteristics of Displacement Cascades in Austenitic Steels under Neutron Irradiation at Cryogenic Temperature


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    Samples of 16Cr - 15 Ni - 3 Mo - 1Ti steel were irradiated to a fast neutron fluence of 1.5 ∙ 1018 cm-2 and 1.5 ∙ 1019 cm-2 (E>0.1 MeV) in the IVV - 2M reactor and investigated by transmission electron microscopy methods. Electron microscopy patterns were obtained. It was shown that the size distribution of clusters had a form close to a Gaussian after irradiation to a fluence of 1.5 ∙ 1018 n∙cm-2. There were several peaks in the distribution histogram of the sample irradiated to 1.5∙1019 n∙cm-2.

    The formation of the low temperature irradiation clusters in austenitic steel was analyzed with a model of displacement cascades overlapping under cryogenic neutron irradiation. All the clusters formed were differentiated into two groups: low-temperature radiation clusters formed by not overlapped displacement cascades (LTRC - 1) and radiation clusters formed by overlapped cascade regions (LTRC - 2). Analytical expressions were obtained to describe the relationships of the average dimensions of LTRC of both groups and the dynamics of cluster accumulation.


    D01, M05, N01, R01, S05

    Author Information:

    Kozlov, AV
    Doctor, SUSE “SB RDIPE”, Zarechny, Sverdlovsk region

    Portnykh, IA
    Doctor, SUSE “SB RDIPE”, Zarechny, Sverdlovsk region

    Skryabin, LA
    Doctor, SUSE “SB RDIPE”, Zarechny, Sverdlovsk region

    Lapin, SS
    Doctor, Leading scientist, Laboratory of mechanical properties, Ekaterinburg,

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP10565S