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Measurement of Three-Dimensional Magnetostriction on Grain-Oriented Electrical Steel Sheet

References WAKABAYASHI, D.—MAEDA, Y.—SHIMOJI, H.—TODAKA, T.—ENOKIZONO, M.: Measurement of Vector Magnetostriction in Alternating and Rotating Magnetic Field, Przeglad Elektrotechniczny 85 No. 1 (2009), 34-38. WAKABAYASHI, D.—TAKASHI, T.—ENOKIZONO, M.: Three-Dimensional Magnetostriction and Vector Magnetic Properties under Alternating Magnetic Flux Conditions in Arbitrary Direction, IEEJ Transactions on Fundamentals and Materials 130 No. 4 (2010), 387-393. ENOKIZONO, M.: Two

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Printed detector bands for measurements of strain in core interior of transformers

R eferences [1] S. G. Ghalamestani, T. G. D. Hilgert, L. Vandevelde and J. J. Dirckx and J. A. A.Melkebeek, “Magnetostriction measurement by using dual heterodyne laser interferometers”, IEEE Trans. Magn. , vol. 46, no. 2, pp. 505-508, (2010). [2] M. Hirano, Y. Ishihara, K. Harada and T. Todaka, “A study on measurement of magnetostriction of silicon steel sheet by laser displacement meter”, J. Magn. Magn. Mater. 254-255 , pp. 43-46, (2003). [3] G. Shilyashki, H. Pfützner, F. Hofbauer, D. Sabic and V. Galabov, “Magnetostriction distribution a

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Influence of Terfenol-D Powder Volume Fraction in Epoxy Matirx Composites on their Magnetomechanical Properies

. Sensors and Actuators A: Physical , 166, 94-101. 4. Diguet G., Beaugnon E., Cavaille J.Y. (2009), From dipolar interactions of a random distribution of ferromagnetic particles to magnetostriction, Journal of Magnetism and Magnetic Materials , 321, 396-401. 5. Dong X., Qi M., Guan X., Ou J. (2010), Microstructure analysis of magnetostrictive composites. Polymer Testing , 29, 369-374. 6. Dong X., Qi M., Guan X., Ou J. (2011), Fabrication of Tb 0;3 Dy 0;7 Fe 2 /epoxy composites: Enhanced uniform magnetostrictive and mechanical properties using a

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Magnetoelastic properties of epoxy resin based TbxHo0.9−xNd0.1 (Fe0.8Co0.2)1.93 particulate composites

-D are practical materials due to high magnetostriction and low magnetic anisotropy, they are not cost-effective enough for commercial applications because Terfenol-D consists mostly of heavy rare earths, Tb and Dy, which are both expensive and scarce in the earth crust. Therefore, a novel magnetostrictive compound based on the lower cost light rare earth is highly desired. Recently, the development of Laves alloys containing Nd element has been a hot research topic, owing to NdFe 2 possessing a large theoretical magnetostriction (λ 111 ~ 2000 ppm at 0 K) and a low

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Magnetostrictive Vibration Model for Evaluation of Mechanical Integrity of Power Transformer Magnetic Core

, Peradeniya, Sri Lanka, DOI: 10.1109/ICIINFS.2017.8300409. 3. Yuan C., Gao X., Li J., Mu X., & Bao X. (2015). Magnetic Domain Motion and Magnetostriction in the Fe–Ga Sheets. IEEE Transactions on Magnetics , 51(11), DOI: 10.1109/TMAG.2015.2442294. 4. Zhang P., Li L., Cheng Z., Tian C., & Han Y. (2019). Study on Vibration of Iron Core of Transformer and Reactor Based on Maxwell Stress and Anisotropic Magnetostriction. IEEE Transactions on Magnetics, 55(2), DOI: 10.1109/TMAG.2018.2875017. 5. ZhangY., Wang J., Sun X., Bai B., & Xie D. (2014). Measurement

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Dynamic magnetoelastic properties of TbxHo0.9−xNd0.1(Fe0.8Co0.2)1.93/epoxy composites

Abstract

TbxHo0.9−xNd0.1(Fe0.8Co0.2)1.93/epoxy (0 ⩽ x ⩽ 0.40) composites are fabricated in the presence of a magnetic field. The structural and dynamic magnetoelastic properties are investigated as a function of both magnetic bias field Hbias and frequency f at room temperature. The composites are formed as textured orientation structure of 1–3 type with 〈1 0 0〉 preferred orientation for x ⩽ 0.10 and 〈1 1 1〉-orientation for x ⩾ 0.25. The composites generally possess insignificant eddy-current losses for frequency up to 50 kHz, and their dynamic magnetoelastic properties depend greatly on Hbias. The elastic modulus (E3 H and E3 B) shows a maximum negative ΔE effect, along with a maximum d33, at a relatively low Hbias ~ 80 kA/m, contributed by the maximum motion of non-180° domain-wall. The 1–3 type composite for x ⩾ 0.25 shows an enhanced magnetoelastic effect in comparison with 0 to 3 type one, which can be principally ascribed to its easy magnetization direction (EMD) towards 〈1 1 1〉 axis and the formation of 〈1 1 1〉-texture-oriented structure in the composite. These attractive dynamic magnetoelastic properties, e.g., the low magnetic anisotropy and d33 , max as high as 2.0 nm/A at a low Hbias ~ 80 kA/m, along with the light rare-earth Nd element existing in insulating polymer matrix, would make it a promising magnetostrictive material system.

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Structure and magnetic properties of powdered and compacted FeNi alloys

Abstract

The crystalline ferromagnetic alloys are known as materials with excellent soft magnetic properties. These alloys have been intensive studied during last decades due to their mechanical and magnetic properties and they are challenge for scientists to extend research of these materials with the aim to broaden their technical applications. FeNi based alloys exhibit very good soft magnetic properties with near-to-zero magnetostriction. This property renders this material as a potential candidate for a differently of industrial applications.

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Vector B-H tester for simple evaluation of vector magnetic characteristics

R eferences [1] M. Yamagashira, S. Ueno, D. Wakabayashi and M. Enokizono, “Vector magnetic properties and two-dimensional magnetostriction of various soft magnetic materials”, int. J. Appl. Electromagn. Mech. , vol. 44, nos.3-4, pp. 387-400, 2014. [2] M. Enokizono, “Two-Dimensional Vector Magnetic Property”, Journal of the Magnetics Society of Japan , vol. 27, no. 2, pp. 25-30, 2003. [3] T. Nakata, Y. Ishihara, M. Nakaji and T. Todaka, “Comparison between the H-coil method and the magnetizing current method for the single sheet tester

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On the application of magnetoelastic properties measurements for plastic level determination in martensitic steels

Abstract

The change in the dislocation density, induced by plastic deformation, influences strongly the magnetic domain structure inside the material. Being so, classic parameters, like the coercivity or magnetic permeability, can be a good measure of the deformation level, yet their reliable determination in a non-destructive way in industrial environment is problematic. The magnetoacoustic emission (MAE) which results from the non-180° domain walls (DW) movement in materials with non-zero magnetostriction can be used as an alternative. The intensity of the MAE signal changes strongly as a result of plastic deformation for both tensile and compressive deformation. It is however possible to discern those cases by analysing the changes in the shape of the MAE signal envelopes. The set of the martensitic steel samples (P91) deformed up to 10% (for both tension and compression) was investigated. Due to geometrical limitations imposed by the special mounting system, enabling compression without buckling, the sample had the shape resulting in low signal to noise (S/N) ratio. Being so the optimization of FFT filtering and wavelet analysis was performed in order to improve sensitivity of the proposed method of deformation level determination.

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Advanced Magnetic Materials for Aeronautics

Abstract

In the field of magnetic sensors, magnetic microwires with positive magnetostriction are the materials of the future. Their mechanical and magnetic properties render them ideal materials for applications in aeronautics. A single microwire with a 40 jj.m diameter and a length of 10 mm is capable of capturing information about tensile stresses, magnetic fields, temperature and distance. This information is carried by a parameter called the Switching Field, HSW, which is specific for different types of microwire. Numerous physical qualities affect the HSW and through sensing of HSW, these qualities may be quantified. (A number of physical qualities affecting HSW can be sensed and quantified by means of a contactless induction method.) What distinguishes the system developed by the present authors from other measuring systems based on magnetic microwires is the positioning of a microwire outside the coil system. Thanks to this improvement it is possible to use microwires embedded directly in the construction material. Small dimensions microwires do not damage the structure of the construction material. The absence of a galvanic connection makes this technology even more interesting compared with traditional forge gauges. Offering the possibility of the simultaneous measuring of four parameters, this technology can be used in a wide range of aviation applications. Measurements of an external magnetic field can be usedfor the navigation and stabilization of an aerial vehicle. Tensile stress and distance measuring can be helpful to understand some processes occurring under the surface of the construction material and also to perform fatigue monitoring or structure load monitoring. Another big advantage of magnetic microwires is the low price. Just 1 gram of base material is sufficient to prepare about 40 km of microwire. All these features combine to offer us a material ideal for Smart Sensors, possibly available for use in the near future.

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