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1
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Temperature Influence on the Functional Properties of Inductive Components with Mn-Zn Ferrite Cores

100%
Jackiewicz D., Kachniarz M., Bieńkowski A.
Acta Physica Polonica A
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2018
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vol. 133
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issue 4
1038-1040
EN
The paper presents the results of investigation of the temperature influence on the inductance and power losses in ferrite cores. Such effect can significantly influence the utility parameters of electronic devices, particularly in precision equipment. For example slight parameter change in this type of components in measuring devices can cause significant changes in output parameters. It is also equally important for mobile devices where increase of losses can limit the duration of service. Special measurement system composed of hysteresis graph, cryostat and PC was utilized to perform the experiment. The cores used during the investigation had closed magnetic circuit. In order to perform measurements of magnetic properties of the material, two sets of windings (magnetizing and sensing) were made on each core. The cores were placed in a cryostat, which was used to set the temperature value within the range from -20 to +50°C. The magnetic properties were measured by the hysteresis graph, to assess the influence of the temperature on the functional parameters.
2
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Modelling the Influence of Stresses on Magnetic Characteristics of the Elements of the Truss Using Extended Jiles-Atherton Model

100%
Jackiewicz D., Szewczyk R., Kachniarz M., Biedrzycki R.
Acta Physica Polonica A
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2017
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vol. 131
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issue 4
1189-1191
EN
Steel trusses structures are commonly used in civil engineering. Their mechanical parameters, especially the durability, are critical, and often human life depends on it. Therefore it is very important to monitor the critical elements of the truss. For this purpose magnetoelastic method of measurement may be used. It is a method having several advantages over other methods, particularly because of use of elements which are already parts of the structure. The study of structural elements have already been conducted. However, to take advantage of the magnetoelastic characteristics measurement to assess the state of stress, one should have a model of the influence of stress on magnetic properties. The influence of stresses on hysteresis loops was modelled with the extended Jiles-Atherton model. The obtained results of the modelling are consistent with the experimental measurements results. The results of modelling create new possibilities of explanation of the physical phenomena connected with magnetization of the magnetic materials under stresses, which is especially important for the assessment of the state of the constructional steel during its exploitation in industrial conditions.
3
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Influence of Temperature on Magnetostrictive Delay Line Properties

100%
Salach J., Charubin T., Nowak P., Jackiewicz D.
Acta Physica Polonica A
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2017
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vol. 131
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issue 4
1183-1185
EN
This paper presents results of tests performed on magnetostrictive delay line concerning its change in properties during temperature changes. Results indicate that an increase in temperature causes a decrease in wave amplitude and increase in the speed of propagation. The material used for the magnetostrictive delay line was an amorphous steel alloy of Fe-Si-B in tape form.
4
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Application of Extended Jiles-Atherton Model for Modelling the Influence of Stresses on Magnetic Characteristics of the Construction Steel

100%
Jackiewicz D., Szewczyk R., Salach J., Bieńkowski A.
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vol. 126
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issue 1
392-393
EN
Paper presents the possibility of application of the Jiles-Atherton extended model to describe the magnetic characteristics of construction steel C45 under the influence of tensile stresses. Experiment was performed on the frame-shaped samples. Then, the influence of stresses on hysteresis loops was modelled with the Jiles-Atherton extended model. The obtained results of the modelling are consistent with results of the experimental measurements. The results of modelling create new possibilities of explanation of the physical phenomena connected with magnetisation of the magnetic materials under stresses, which is esential for the assessment of the state of the construction steel during its exploitation in industrial conditions.
5
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Amorphous Soft Magnetic Fe_{80}B_{11}Si_{9} Alloy in Tensile Stress Sensors Application

88%
Salach J., Jackiewicz D., Bieńkowski A., Szewczyk R., Gruszecka M.
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vol. 126
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issue 1
102-103
EN
Paper presents the results of investigations of the influence of the tensile stresses on magnetic characteristics of Fe_{80}B_{11}Si_{9} amorphous alloy in as quenched and annealed state. For the tests, a special methodology of application of uniform tensile stresses to the ring shaped sample was developed. Due to special non-magnetic pads, the magnetizing and sensing coils can be wound around the core. Experimental results indicate high stress sensitivity of Fe_{80}B_{11}Si_{9} alloy in both as-quenched and annealed state. Permeability of the core decreases over 64% and 58% for as-quenched and annealed core respectively, especially for lower values of the amplitude of magnetizing field.
6
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Temperature Resistance of Magnetoelastic Characteristics of 13CrMo4-5 Constructional Steel

64%
Jackiewicz D., Kachniarz M., Rozniatowski K., Dworecka J., Szewczyk R., Salach J., Bienkowski A., Winiarski W.
Acta Physica Polonica A
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2015
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vol. 127
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issue 2
614-616
EN
In the paper the results of investigation on tensile stresses dependence of magnetoelastic characteristics of cores made of 13CrMo4-5 constructional steel are presented. In the investigation step-cooling test treated samples were used. The step-cooling test process is a type of heat treatment simulating effects of passing time and environmental conditions (temperature and stress) on the sample. In the paper the method of testing the influence of stresses on the magnetic characteristics is presented. Frame shaped samples ensured a closed magnetic circuit and homogeneous distribution of stress. It was found that step-cooling test does not significantly influence the magnetoelastic characteristics and the structure of the samples. On the other hand, then tensile stresses significantly change the magnetic characteristics of 13CrMo4-5 constructional steel. That confirms the possibility of using measurements based on the magnetoelastic effect in the stress assessment for industrial non destructing testing of steel constructions.
7
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Influence of Thermomagnetic Treatment on Magnetoelastic Properties of FeNiMoB Amorphous Alloy

64%
Szewczyk R., Svec P., Salach J., Švec P., Bieńkowski A., Hoško J., Jackiewicz D., Kamiński M., Winiarski W.
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vol. 126
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issue 1
52-53
EN
Paper presents the results of magnetoelastic tests of ring-shaped cores made of Fe_{40}Ni_{38}Mo_{4}B_{18} amorphous alloy. The cores were subjected to thermomagnetic annealing under different values of magnetic field. The obtained results enabled us to connect the magnetoelastic characteristics of Fe_{40}Ni_{38}Mo_{4}B_{18} amorphous alloy with the conditions of thermomagnetic treatment of the material.
8
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The Influence of Thermomagnetic Treatment on the Magnetoelastic Characteristics of Fe₆₁Co₁₉Si₅B₁₅ Amorphous Alloys

64%
Salach J., Szewczyk R., Svec Sr P., Bieńkowski A., Jackiewicz D., Svec P., Nowicki M., Winiarski W., Kachniarz M., Gruszecka M.
Acta Physica Polonica A
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2015
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vol. 127
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issue 2
617-619
EN
Information about magnetoelastic properties of newly developed amorphous magnetic alloys is very important from practical point of view, especially in the case of high permeability materials such as the Fe₆₁Co₁₉Si₅B₁₅ amorphous alloy. In the case of such materials, effect connected with the influence of external stresses on the magnetic properties of the alloy should be tested. This paper presents experimental results of the magnetoelastic properties investigation of the Fe₆₁Co₁₉Si₅B₁₅ amorphous alloy, annealed without magnetic field as well as in the magnetic field. Such thermo-magnetic treatment generated anisotropy has significant influence on the total free energy of magnetic material. In the magnetoelastic investigation, the compressive stress was applied to the ring shaped core, perpendicularly to the magnetizing field direction. Due to the fact, that cores with closed magnetic circuits were used, demagnetization did not change the balance of total free energy in the material.
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