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Assessment of the Magnetostrictive Properties of the Selected Construction Steel

100%
Juś A., Nowak P., Gińko O.
Acta Physica Polonica A
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2017
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vol. 131
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issue 4
1084-1086
EN
The paper presents results of research on the effects of mechanical stresses on the magnetostrictive properties of 13CrMo4-5 steel. Measurements of stress dependence of magnetostriction fill the gap in the state of the art enabling description of relationships between stresses applied to the samples and its magnetoelastic and magnetostrictive properties. Performed studies represent the starting point for development of unified model of both Villari (magnetoelastic) and Joule (magnetostrictive) effects under stresses in steels. The formulated model will be the basis for the development of generalized methods of interpreting the results of non-destructive testing of the state of the internal stresses in steels based on these phenomena.
2
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Utilization of Eddy Current Tomography in Automotive Industry

100%
Nowak P., Nowicki M., Juś A., Szewczyk R.
Acta Physica Polonica A
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2017
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vol. 131
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issue 4
1168-1170
EN
Paper presents utilized innovative setup for eddy current tomography and possibility of its utilization in automotive industry. Described tomography setup is designed for testing axisymmetric objects thus motor valve was selected for exemplary testing. Tests were conducted on motor valve in original state. Afterwards reference defect was created on element and measurements were repeated. Significant difference between tests results were observed, thus potential for utilization in automotive industry was confirmed. Finite element method simulations were applied in order to confirm the measurement results. Calculations were conducted in open-source finite element method software, which solves Maxwell equations in the A-V form. Modelling results confirm possibility of finite element method-based inverse tomography transformation.
3
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Magnetic Amorphous Micro-Force Sensor

88%
Nowicki M., Kachniarz M., Juś A., Charubin T., Radzikowska-Juś W.
Acta Physica Polonica A
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2017
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vol. 131
|
issue 4
1180-1182
EN
In this paper the innovative method of microforce measurement based on air gap influence on magnetic circuits properties is presented. Magnetic ribbon core with air gap is put under transverse compressive stress perpendicular to the magnetic field direction generated by low-mass calibration weight. Change of the air gap induced by the force acting on the core causes change of its magnetic parameters. The possibility of utilization of various magnetic amorphous materials is investigated. Obtained results indicate a possibility of application of the developed sensor in microforce measurements.
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