STP1329: Reconstitution of Charpy Impact Specimens by Surface Activated Joining

    Nishiyama, Y
    Japan Atomic Energy Research Institute,

    Fukaya, K
    Japan Atomic Energy Research Institute,

    Onizawa, K
    Japan Atomic Energy Research Institute,

    Suzuki, M
    Japan Atomic Energy Research Institute,

    Nakamura, T
    Ishikawajimaharima-Heavy Industries Co., Ltd, Yokohama,

    Kaihara, S
    Ishikawajimaharima-Heavy Industries Co., Ltd, Yokohama,

    Sato, A
    Ishikawajimaharima-Heavy Industries Co., Ltd, Yokohama,

    Yoshida, K
    Ishikawajimaharima-Heavy Industries Co., Ltd, Yokohama,

    Pages: 11    Published: Jan 1998


    Abstract

    The method of surface activated joining (SAJ) was applied to reconstitution of Charpy impact specimens. SAJ makes use of friction at material surfaces in a vacuum to achieve joining without melting. This paper describes verification to apply SAJ to reconstitution of Charpy impact specimens with unirradiated reactor pressure vessel plate materials, JRQ and HSST-03. By optimizing joining parameters, heat affected zones induced by friction had a width of about 1 mm to either side of the joint. The original Charpy impact properties in the transition region were reproduced from reconstituted impact specimens with the insert length of 10 mm. The maximum temperature during joining was appreciably low at a given distance from the joining interface, compared with other conventional welding techniques.

    Keywords:

    reactor pressure vessel surveillance, reconstitution, Charpy impact specimen, surface activated joining, friction, heat affected zone


    Paper ID: STP38007S

    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP38007S


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