STP1047

    EB Welding of Low-Activation Vanadium-Binary Alloys

    Published: Jan 1990


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    Abstract

    Tensile properties at 298 and 77 K of the electron-beam-welded joints of low neutron activation vanadium-binary alloys were evaluated. (1) Yield and tensile strengths of the welded specimens increased with an increase of carbon of up to 1.6%, boron of up to 5.0% and chromium of up to 9.3% by weight. (2) All the materials were embrittled by the welding, though the order of embrittlement depended on the additive and its content. The order of embrittlement was the least for vanadium-boron (V-B) alloys and the most for vanadium-chromium (V-Cr) alloys. (3) The location of fracture in the tensile specimens was in the weld metal for V-C and V-Cr alloys and the heat-affected zone (HAZ) for V-B alloys. Fracture mode depended on the additive and temperature. Most of the alloys at 298 K and V-B alloys at 77 K showed the ductile fracture, while V-C and V-Cr at 77 K showed the cleavage fracture.

    Keywords:

    vanadium-binary alloys, carbon, boron, chromium, low-activation, EB welding, tensile properties, yield strength, tensile strength, elongation, reduction-in-area, ductility, fracture mode


    Author Information:

    Hiraoka, Y
    Senior researcher, head of the second laboratory, and director, Tsukuba Laboratories, National Research Institute for Metals, Tsukuba, Ibaraki

    Noda, T
    Senior researcher, head of the second laboratory, and director, Tsukuba Laboratories, National Research Institute for Metals, Tsukuba, Ibaraki

    Okada, M
    Senior researcher, head of the second laboratory, and director, Tsukuba Laboratories, National Research Institute for Metals, Tsukuba, Ibaraki


    Paper ID: STP24960S

    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP24960S


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