STP1366

    In-Reactor Creep Regularities of Copper

    Published: Jan 2000


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    Abstract

    The systematic research of in-reactor creep regularities for different purity polycrystalline copper and elaboration of the related theoretical model are discussed. The stress and temperature dependence of the in-reactor and thermal creep rates of pure copper and temperature dependence of the in-reactor and thermal creep rates of technical copper have been analyzed. It is shown that for each of the materials studied there is a temperature region where an abnormal reduction of the creep rate with increasing temperature takes place. A creep model based on dislocations sliding and thermoactivation overcoming of barriers by them is suggested. It is shown that the model well describes the conduct peculiarities of the in-reactor and thermal creep rates of copper in different temperature-strength conditions. The reasons for the abnormal temperature dependence of the creep rate in the intermediate temperature region are discussed.

    Keywords:

    creep, yield stress, irradiation, dislocation, copper


    Author Information:

    Aitkhozhin, ES
    Group leader, deputy director and senior scientist, Institute of Nuclear Physics, National Nuclear Center, Almaty,

    Pyatiletov, YS
    Group leader, deputy director and senior scientist, Institute of Nuclear Physics, National Nuclear Center, Almaty,

    Chumakov, EV
    Group leader, deputy director and senior scientist, Institute of Nuclear Physics, National Nuclear Center, Almaty,


    Paper ID: STP12427S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP12427S


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