Magnetic after-effect study of the Cu-precipitation in thermally aged Fe-1%Cu alloys

Boris Minov, Lode Vandenbossche, Milan Konstantinovic, Luc Dupré, Dmitry Terentyev

    Research outputpeer-review


    A magnetic after-effect setup is developed and used to study the Cu-precipitation process in thermally aged Fe-1%Cu alloys, as a complementary process to the irradiation induced hardening due to Cu-precipitation in iron-based alloys used as structural materials in the nuclear industry. The magnetic relaxation spectra, measured in the temperature region from 200K to 500K, show the existence of two relaxation processes centered at 260K and 330K, which are assigned as the Snoek-carbon relaxation process and thermal activation of dislocation motion, respectively. The behavior of both processes are influenced by copper precipitation. The growth of copper precipitates by increasing the aging time influences the carbon kinetics, which is manifested by a strong decrease of the Snoek peak intensity. On the contrary, the peak intensity related to dislocation relaxation exhibits an increase by increasing the aging time as a consequence of the decrease of Cu-precipitate number density and dislocation pinning.
    Original languageEnglish
    Pages (from-to)521-524
    JournalIEEE Transactions on Magnetics
    Issue number2
    StatePublished - Feb 2010
    Event2009 - 19th International Conference on Soft Magnetic Materials - IEEE, Turin
    Duration: 6 Sep 20099 Sep 2009

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