An experimental method for evaluating the critical fields of moving domain boundaries in plastically tension-deformed low-carbon wires

Ничипурук, А. П.; Rozenfel'd, E. V.; Огнева, М. С.; Сташков, А. Н.; Королев, А. В.

doi:10.1134/s1061830914100088

Cited by 15 publications

(7 citation statements)

References 4 publications

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“…An increase in the magnetic field leads to an increase in the size of the domains directed collinear to the field. Previously, many experts reported that moving domain boundaries is less energy-intensive than absorption domains with each other [ 55 , 56 , 57 , 58 ]. Based on the MFM data, we can conclude that samples P0 and P1 are magnetized mainly due to the absorption of neighboring domains, and samples P0.1 and P0.01 are due to an increase in the size of domains during the absorption of disordered regions.…”

Section: Resultsmentioning

confidence: 99%

Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure

et al. 2021

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The effect of microstructure on the efficiency of shielding or shunting of the magnetic flux by permalloy shields was investigated in the present work. For this purpose, the FeNi shielding coatings with different grain structures were obtained using stationary and pulsed electrodeposition. The coatings’ composition, crystal structure, surface microstructure, magnetic domain structure, and shielding efficiency were studied. It has been shown that coatings with 0.2–0.6 µm grains have a disordered domain structure. Consequently, a higher value of the shielding efficiency was achieved, but the working range was too limited. The reason for this is probably the hindered movement of the domain boundaries. Samples with nanosized grains have an ordered two-domain magnetic structure with a permissible partial transition to a superparamagnetic state in regions with a grain size of less than 100 nm. The ordered magnetic structure, the small size of the domain, and the coexistence of ferromagnetic and superparamagnetic regions, although they reduce the maximum value of the shielding efficiency, significantly expand the working range in the nanostructured permalloy shielding coatings. As a result, a dependence between the grain and domain structure and the efficiency of magnetostatic shielding was found.

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Section: Resultsmentioning

confidence: 99%

Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure

et al. 2021

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“…The magnetic properties were measured by the Remagraph C-500 Dr.Steingroever Gmbh magnetometric setup, as well as the setup described in [17] and schematically shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

“…The stresses are maximum in the direction of the applied load, the "easy-plane" being perpendicular to it. The most informative parameter, according to the experimental studies of the magnetoelastic effect in polycrystalline steels [17][18][19], is the magnetic incremental permeability, the eld dependences of which were measured in the experiment.…”

Section: Ironmentioning

confidence: 99%

“…The magnetic incremental permeability is known to be sensitive to the stress-strain state [15,16]. Two or three maxima were found to occur on the eld dependences of the magnetic incremental permeability µ rev (H) of plastically deformed by tension after unloading and elastically compressed carbon steels [17][18][19]. The µ rev (H) curves of undeformed steel exhibited one single maximum in the eld of the coercivity.…”

Section: Introductionmentioning

confidence: 99%

“…The appearance of additional maxima on the µ rev (H) curves was explained by the induced magnetic anisotropy of the "easy plane" type in the deformed steel. The approach [17] does not require preliminary calibration of equipment on reference samples. The compressive stresses estimation in the proposed technique was carried out via the experimentally found elds of extreme maxima in the µ rev (H) dependences and saturation magnetization M s , taking into account the magnetostriction constant λ 100 .…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Incremental Permeability of Elastically Deformed Iron and Nickel

Stashkov,

Schapova,

Nichipuruk

et al. 2023

J Nondestruct Eval

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The eld dependences of the magnetic incremental permeability U ~(H) have been measured on nickel and iron subjected to both elastic compression and tension. The in ections and additional maxima on the U ~(H) curves are observed for nickel under tension and for iron under compression. The appearance of the features on the U ~(H) curves is traceable to the induction of magnetic texture of the "easy-plane" type caused by elastic deformation of nickel and iron samples. These features appear only if the signs of magnetostriction and applied load are opposite. Only in this case, there is the possibility of estimation of applied mechanical stresses and residual stresses (after annealing). This can be useful for technical diagnostics of objects made of ferromagnetic materials with different signs of magnetostriction. The proposed technique is makes it possible to estimate the "easy-axis" magnetostriction constant.

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Research on Yield Strength Estimation and Lift-off Suppression Method Based on Incremental Permeability Features

Liu

Wang

et al. 2023

J Nondestruct Eval

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The incremental permeability(IP) is related to the reversible domain movements of ferromagnetic materials during the period of dynamic magnetization. The IP signal generated by reversible domain motion is weak, during the experiment, the vibration of the platform and the uneven surface of the sample will affect the lift-off value of the probe, resulting in the distortion of the IP signal. In order to solve this problem, the change of IP feature γ reflecting the average grain size of the material under different lift-off conditions is studied, and the corresponding relationship between this feature and lift-off is quantitatively analyzed. In this paper, the fitting method of γ curve is revised to reduce its fitting under different lifting conditions . Two parameters 𝑎 𝛾 and 𝑏 𝛾 are proposed to modify the γ curve when lift-off changes. Finally, the yield strength of the material is estimated under different lift-off conditions, and the estimation error is less than 10%.

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An experimental method for evaluating the critical fields of moving domain boundaries in plastically tension-deformed low-carbon wires

Cited by 15 publications

References 4 publications

Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure

Efficiency of Magnetostatic Protection Using Nanostructured Permalloy Shielding Coatings Depending on Their Microstructure

Magnetic Incremental Permeability of Elastically Deformed Iron and Nickel

Research on Yield Strength Estimation and Lift-off Suppression Method Based on Incremental Permeability Features

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