On the deformation induced internal friction peaks in niobium

René De Batist

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    The activation energies and attempt frequencies for the deformation induced damping peak.s in niobium are determined. For the α peak these are found to be 0.28 ± 0.01 eV and (2.8±1,8) 1012s-1 from the variation of peak temperature with frequency and using all experimental data presently available. For the β peak, these parameters are estimated using strain recovery experiments performed during the warming-up after plastic deformation at liquid nitrogen temperature. A value of 0.51 eV is found for 1012s-1 and 0.48 eV for 1012s-1, to be compared with values of 0.47 eV and about 1012s-1 obtained by Chambers and SCHULTZ from the shift of peak temperature with frequency. The width of the α peak is shown to be consistent with a relaxation process having a single attempt frequency, and a distribution of activation energies. Assuming a square distribution of width ΔH/H ≈ 0.10.
    Original languageEnglish
    PublisherSCK CEN
    Number of pages10
    StatePublished - May 1963

    Publication series

    NameSCK CEN Reports
    PublisherSCK CEN

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