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    Wyświetlanie 1-6 z 6
    Tytuł:
    Application of Neutron Refraction for Characterization and Optimization of High-Damping Iron-Based Alloys
    Autorzy:
    Udovenko, V. A.
    Polyakova, N. A.
    Chudakov, I. B.
    Milczarek, J. J.
    Mikke, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2011037.pdf
    Data publikacji:
    1999-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.12.-q
    75.50.Bb
    75.60.Ej
    75.80.+q
    Opis:
    High-damping alloys with the magnetomechanical damping mechanism, based on the Fe-Cr system, have been studied. It has been shown that the direct investigation of the magnetic domain structure in the bulk materials using the neutron refraction method allows one to obtain important quantitative information concerning the formation of the high-damping state. The dependence of the damping capacity on the average magnetic domain size was found to possess a sharp maximum, thus revealing a range of the optimal domain sizes. The results obtained are important for the development of the technology of high-damping materials.
    Źródło:
    Acta Physica Polonica A; 1999, 96, 2; 303-306
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Mechanism of the High-Damping State Formation in the Fe-Mn-Si Shape Memory Alloys
    Autorzy:
    Udovenko, V. A.
    Polyakova, N. A.
    Turmambekov, T. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2011038.pdf
    Data publikacji:
    1999-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.16.-d
    75.50.Bb
    75.60.Ej
    75.80.+q
    Opis:
    The structural mechanism of the high-damping state formation in the Fe-Mn-Si alloys has been investigated using transition electron microscopy and logarithmic decrement measurements. The high level of the elastic energy dissipation was found to be connected with a reversible movement of the Shockley dislocations under the sign changing stress action. The Shockley dislocations density and mobility are controlled by the alloys compositions and prior deformation value. The increase in the dislocations density with the help of the special cycling treatments can improve the alloys damping capacity.
    Źródło:
    Acta Physica Polonica A; 1999, 96, 2; 307-310
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Treatment Effect on Bulk Magnetoelastic Properties of High Damping Fe-Based Alloys
    Autorzy:
    Chudakov, I. B.
    Udovenko, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1945271.pdf
    Data publikacji:
    1996-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.40.+i
    75.50.Bb
    75.60.Ej
    75.80.+q
    Opis:
    Binary and complex alloyed high damping steels on the base of Fe-Cr and Fe-Al systems was investigated. It was shown that already slight surface treatment leads to the increase in magnetic anisotropy of the material and to the decrease in damping capacity.
    Źródło:
    Acta Physica Polonica A; 1996, 89, 3; 425-430
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ordering and Magnetoelastic Properties of Fe-Ga Alloy
    Autorzy:
    Perduta, K.
    Olszewski, J.
    Busbridge, S.
    Nabiałek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811585.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    75.50.Bb
    75.80.+q
    81.40.Ef
    83.80.Ab
    Opis:
    In this paper the investigations of the ordering, microstructure and magnetomechanical properties of the $Fe_{80}Ga_{20}$ alloy and its composites are presented. The composites consisted of the Fe-Ga particles with a size distribution in the range between 20 and 50 μm. These particles were produced by blade-milling of arc-melted alloy. After milling the powders were annealed at 723 K for 2.5, 7.5, and 12.5 h. The epoxy-bonded composites in rectangular shape were made from the as-cast as well as from the annealed powders. The Mössbauer spectroscopy studies revealed that the as-cast alloy is completely disordered. After annealing at 723 K the long range atomic order appeared. It was stated that the best magnetoelastic properties were exhibited by composites made from ferromagnetic particles obtained from the as-cast alloy. The measured saturation magnetostriction was $λ_s = 70× 10^{-6}$ for the bulk alloy and $λ_s=100× 10^{-6}$ for composite.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6; 1537-1543
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stress Monitoring in Steel Elements via Detection of AC Magnetic Permeability Changes
    Autorzy:
    Szumiata, T.
    Hibner, K.
    Dziewiecki, K.
    Mazur, Z.
    Gockiewicz, A.
    Gzik-Szumiata, M.
    Górka, B.
    Witoś, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030407.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.80.+q
    75.60.Ej
    75.50.Bb
    75.30.Gw
    62.20.D-
    Opis:
    The influence of mechanical stress on low frequency AC magnetic permeability was studied. The cold-drawn bars with C45 steel were subjected to investigation. The tensile stress (within elastic regime) was applied by means of material testing machine. Simple measuring system was assembled, which consisted of: function generator with magnetizing coil, detection coil and precise AC voltmeter. The registered changes of induced voltage were proportional to the change of magnetic permeability of the stretched rods. The obtained results were almost frequency-independent due to low frequency limit (250-500 Hz, weak eddy currents, no spin-origin energy dissipation). A significant magneto-mechanical hysteresis was observed slightly evolving from cycle to cycle with tendency of stabilization. The extension of basic Stoner-Wohlfarth model of magnetic permeability allowed to fit the data reproducing hysteretic behavior and considering the relaxation of the internal stress. The proposed, low-cost method is suitable in the industrial applications for stress control in large-sized steel elements.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 719-721
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the Magnetostrictive Properties of the Selected Construction Steel
    Autorzy:
    Juś, A.
    Nowak, P.
    Gińko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032160.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.80.+q
    75.50.Bb
    85.70.Ec
    07.55.Ge
    46.25.Hf
    Opis:
    The paper presents results of research on the effects of mechanical stresses on the magnetostrictive properties of 13CrMo4-5 steel. Measurements of stress dependence of magnetostriction fill the gap in the state of the art enabling description of relationships between stresses applied to the samples and its magnetoelastic and magnetostrictive properties. Performed studies represent the starting point for development of unified model of both Villari (magnetoelastic) and Joule (magnetostrictive) effects under stresses in steels. The formulated model will be the basis for the development of generalized methods of interpreting the results of non-destructive testing of the state of the internal stresses in steels based on these phenomena.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1084-1086
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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