Magnetic and magnetoacoustic parameters for estimating the degree of recrystallization and anisotropy

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Abstract

The influence of variation of annealing temperature on magnetic and magnetoacoustic properties of cold-deformed alloy 97 % Ni, 3 % Fe has been investigated. The study of the microstructure of the nickel—iron alloy showed the presence of rolling texture up to annealing temperatures of about 500 ºC. At further increase of annealing temperature of the investigated alloy as a result of recrystallization the texture disappears and anisotropy of its magnetic and magnetoacoustic parameters decreases significantly. The sensitivity of magnetic and magnetoacoustic parameters to the rolling-induced anisotropy of the nickel—iron alloy has been compared. It is shown that the differential magnetic permeability measured with the DIUS-1.21M hardware and software system is the most sensitive parameter to anisotropy.

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About the authors

Vadim N. Perov

M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences

Email: perovadim22@gmail.com
Russian Federation, 620108 Yekaterinburg, S. Kovalevskaya Street, 18

Leonid V. Mikhaylov

M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences

Email: mikhaylov_lv@imp.uran.ru
Russian Federation, 620108 Yekaterinburg, S. Kovalevskaya Street, 18

Vladimir N. Kostin

M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences

Email: kostin@imp.uran.ru
Russian Federation, 620108 Yekaterinburg, S. Kovalevskaya Street, 18

Anna M. Povolotskaya

M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences

Author for correspondence.
Email: povolotskaya@imp.uran.ru
Russian Federation, 620108 Yekaterinburg, S. Kovalevskaya Street, 18

References

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Supplementary files

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2. Fig. 1. External appearance of the Polytec PSV-500-HV vibrometer (a) and magnetizing device (b): 1 — disk sample; 2 — sample clamp; 3 — solenoid; 4 — cartridge (sample holder); 5 — cartridge guide; 6 — fixing screws; 7 — slot for focusing the laser on the end face of the sample.

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3. Fig. 2. Dependences of the coercive force Hc (a), residual magnetic induction of the substance Br (b), maximum magnetic permeability μmax (c) and the critical field Hk determined from the shape of the hysteresis loop (d) on the annealing temperature of Ni—Fe alloy samples.

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4. Fig. 3. Hysteresis loop and field dependence of differential magnetic permeability of a sample annealed at 600 °C.

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5. Fig. 4. The same as in Fig. 3, but for a sample annealed at 700 °C.

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6. Fig. 5. The same as in Fig. 3, but for a sample annealed at 800 °C.

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7. Fig. 6. Microstructure of the sample after annealing at 400 °C (a) and dependences of the coercive force (b), maximum differential magnetic permeability (c) and dynamic magnetostrictive sensitivity (d) on the direction of magnetization.

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8. Fig. 7. The same as in Fig. 6, after annealing at 700 °C.

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