STP1046

    Estimation of Radiation Vacancy Rate Absorption by Grain Boundaries

    Published: Jan 1990


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    Abstract

    The shift of internal friction grain boundary maximum temperature (Ke-peak) versus the generation rate of point defects has been investigated in pure nickel and iron as well as in austenitic steel and a Fe-11B alloy. The obtained data allows the estimation of the excess fluxes of both the radiation-caused vacancies to grain boundaries and interstitials to dislocations. These fluxes are linearly dependent on the generation rate of defects in pure nickel and iron, while for both the stainless steel and iron-boron alloy for the temperature interval of 700 to 950 K in the generation rate region of 10-4 - 2.4 × 10-8 dpa ∙ s-1, the dependence is nonlinear. This is probably connected with the fact that mutual vacancy-interstitial recombination does not affect the accumulation and annealing of defects in nickel and iron, but recombination may be essential in stainless steel and iron-boron alloys. To estimate the tendency toward radiation swelling, the value of point defects' (vacancies or interstitials) excess flux to the generation rate of defects ratio has been introduced.

    Keywords:

    internal friction, grain boundary maximum, vacancies, interstitials, neutron irradiation, nickel, iron, boron


    Author Information:

    Grinik, EU
    Senior research worker, chief, and research worker, Institute for Nuclear Research of the Ukrainian SSR Academy of Sciences, Kiev,

    Karasev, VS
    Senior research worker, chief, and research worker, Institute for Nuclear Research of the Ukrainian SSR Academy of Sciences, Kiev,

    Totsky, AY
    Senior research worker, chief, and research worker, Institute for Nuclear Research of the Ukrainian SSR Academy of Sciences, Kiev,


    Paper ID: STP24675S

    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP24675S


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