Effects of neutron irradiation on microstructure and deformation behaviour of mono- and polycrystalline molybdenum and its alloys

B.N. Singh, J.H. Evans, A. Horsewell, P. Toft, G.V. Müller

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    The influence of neutron irradiation on microstructural evolution and mechanical properties of mono- and polycrystalline molybdenum and its alloys has been investigated. Tensile specimens and 3 mm diameter discs of monocrystals of pure molybdenum and Mo-5%Re were irradiated with fission neutrons at similar to 320 K to displacement doses in the range 5.4 x 10(-4) to 1.6 x 10(-1) dpa (NRT) in the DR-3 reactor at Riso National Laboratory. For comparison, polycrystalline specimens of Mo-5% Re and TZM were also irradiated together with the monocrystalline specimens. Both unirradiated and irradiated specimens were tensile tested at 295 K. Post-irradiation microstructures were quantitatively characterized using a transmission electron microscope (TEM). Fracture surfaces were examined in a scanning electron microscope (SEM). The results of tensile testing as well as of transmission and scanning microscopy are presented and discussed in terms of intracascade clustering of self-interstitial atoms and the role of one-dimensional glide of these clusters in controlling microstructural evolution and the resulting mechanical properties.
    Original languageEnglish
    JournalJournal of Nuclear Materials
    Volume263
    Issue numberA
    Pages (from-to)865-872
    ISSN0022-3115
    DOIs
    Publication statusPublished - Oct 1998
    Event8th International conference on fusion reactor materials (ICFRM-8) - Sendai, Japan
    Duration: 26 Oct 199731 Oct 1997
    Conference number: 8

    Conference

    Conference8th International conference on fusion reactor materials (ICFRM-8)
    Number8
    CountryJapan
    CitySendai
    Period26/10/199731/10/1997
    SponsorTohoku University

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