STP782

    The Influence of Neutron Irradiation on the Properties of Beryllium

    Published: Jan 1982


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    Abstract

    The room temperature mechanical properties of unirradiated hot and cold isostatically pressed high purity beryllium and Zircaloy-2 are compared in three-point bend tests. For ram displacement rates of 1 mm min−1 beryllium exhibits comparable ductility (outer fibre strain) to that obtained with Zircaloy. However, for faster ram displacement rates (6.25 mm s−1) the beryllium specimen fractured in an elastic manner. Fast (E > 1 MeV) neutron irradiation of a beryllium specimen at 350 K to a fluence of 6.44 × 1024 n m−2 results in a negative growth strain of 0.03% and a loss in ductility. No visible radiation damage was detected by transmission electron microscopy and the observed irradiation growth strain is attributed to the formation of submicroscopic defect clusters.

    Keywords:

    beryllium, Zircaloy, three-point bend, irradiation growth, ductility, defect clusters, crystallographic texture


    Author Information:

    Fleck, RG
    Unit Head, Nuclear Metallurgy, Metallurgical Research Department, Ontario Hydro Research Division, Toronto, Ontario


    Paper ID: STP34376S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP34376S


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