STP683

    Radiation Damage Effects in 16-MeV Proton and 14-MeV Neutron Irradiated Nickel and Niobium

    Published: Jan 1979


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    Abstract

    The high-energy (>10 keV) recoil spectra induced in metals by 16-MeV protons have been predicted to be similar to that induced by 14-MeV neutrons. The damage induced in nickel and niobium by 16-MeV protons and 14-MeV neutrons has been evaluated by transmission electron microscopy and flow stress measurements.

    Nickel and niobium wires (0.18 mm diameter) and foils have been irradiated with 16-MeV protons from the Tandem Van de Graaff at the Nuclear Physics Laboratory of the University of Washington and 14-MeV neutrons from the Rotating Target Neutron Source I at Lawrence Livermore Laboratory. These irradiations were performed on specimens that were prepared and tested in a similar manner.

    The damage induced in nickel and niobium at 20°C by 16-MeV protons and 14-MeV neutrons was found to exhibit many similarities with respect to the size and density of defect clusters. The yield strength increases were found to be slightly higher in the proton-irradiated materials as a function of particle fluence.

    Keywords:

    fusion, neutrons, protons, nickel, niobium, damage, microstructure, flow stress


    Author Information:

    Jones, RH
    Senior research scientist, senior research scientist, and research scientist, Battelle-Northwest Laboratories, Richland, Wash.

    Styris, DL
    Senior research scientist, senior research scientist, and research scientist, Battelle-Northwest Laboratories, Richland, Wash.

    Bradley, ER
    Senior research scientist, senior research scientist, and research scientist, Battelle-Northwest Laboratories, Richland, Wash.


    Paper ID: STP38175S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP38175S


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