Magnetic Behaviour of the Ferromagnetic Fe–Ni–Co–Ti Alloy Subjected to Thermomechanical Treatment

A. M. Titenko$^{1}$, A. O. Perekos$^{2}$, L. D. Demchenko$^{3}$, M. B. Babanli$^{4}$, M. S. Nizameyev$^{2}$, S. S. Huseynov$^{4}$

$^{1}$Institute of Magnetism under NAS and MES of Ukraine, 36b Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{3}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
$^{4}$Azerbaijan State Oil and Industrial University, 20 Azadliq, 1010 Baku, Azerbaijan

Received: 27.06.2018. Download: PDF

The effect of thermomechanical treatment on magnetic behaviour of the polycrystalline Fe–Ni–Co–Ti alloy is investigated. The object of the study is a ferromagnetic alloy after preliminary thermomechanical treatment. The characteristic temperatures of the martensitic and magnetic transformations are determined from the temperature dependences of low-field magnetic susceptibility, electrical resistivity, and magnetization. According to the data of field dependences of magnetization, it is established that the relative increase in the austenitic-phase magnetization by 30% is achieved because of an additional plastic deformation of the alloy under uniaxial tension (relative to the initial state). The change in the alloy magnetic characteristics depending on selected preliminary thermomechanical treatment is associated with a decrease in the volume fraction of the ferromagnetic phase under ageing and the formation of a system of microinhomogeneities in material that results in the appearance of additional induced magnetic anisotropy under both the thermomechanical treatment and, especially, the tensile test.

Key words: magnetization, deformation, thermomechanical treatment, nanoparticles, differential scanning calorimetry.



PACS: 62.20.fg, 62.20.Qp, 75.50.Bb, 75.60.Ej, 81.30.Kf, 81.40.Ef, 81.40.Rs, 81.70.Pg

Citation: A. M. Titenko, A. O. Perekos, L. D. Demchenko, M. B. Babanli, M. S. Nizameyev, and S. S. Huseynov, Magnetic Behaviour of the Ferromagnetic Fe–Ni–Co–Ti Alloy Subjected to Thermomechanical Treatment, Metallofiz. Noveishie Tekhnol., 40, No. 9: 1209—1220 (2018) (in Russian)

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