Non-destructive testing by the eddy current method of half-shafts after induction hardening

2021 ◽  
Vol 25 (3-4) ◽  
pp. 18-21
Author(s):  
Adam Kondej ◽  
Tadeusz Samborski
Keyword(s):  
Automobile Industry ◽  
Eddy Currents ◽  
Induction Hardening ◽  
Current Method ◽  
Research Network ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Eddy Current Method ◽  
Drive Systems ◽  
Non Destructive

The non-destructive testing method with applying eddy currents carried out on drive half-shafts used in the car drive systems was described. The aim of the testing was to establish if the tested shafts were inductively hardened. At the Łukasiewicz Research Network - Institute of Precision Mechanics, the control and measurement system was designed and built to detect efficiently the martensite structure and therefore to make possible quick control of any elements. The system has been implemented at the Neapco Europe, the manufacturer of drive-shafts for the automobile industry, in Praszka, Poland.

scholarly journals Non–Destructive Testing of Conductive Material by Eddy Current Air Probe Based on Swept Frequency

2015 ◽  
Vol 66 (3) ◽  
pp. 174-177 ◽  
Author(s):  
Andrea Štubendeková ◽  
Ladislav Janoušek
Keyword(s):  
Numerical Model ◽  
Eddy Current ◽  
Current Method ◽  
Wide Frequency Range ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Eddy Current Method ◽  
Exciting Coil ◽  
Non Destructive ◽  
2D Numerical Model

Abstract This article deals with non-destructive testing of conductive materials by eddy current method based on swept frequency. A 2D numerical model of eddy current air-core probe was created in the LTspice software at first. The probe consists of two coils: exciting coil and receiving. The probe is positioned in air in this case. Experimental and calculated frequency responses of the probe are obtained within a wide frequency range using swept frequency in order to validate the model. Frther a 3D model used for non-destructive testing of austenitic steel plate with three electro-discharge machined notches is then developed accordingly. Results of measurement are compared with 3D numerical model using COMSOL Multiphysics software.

Hardness assessment of induction hardened layers based on the analysis of eddy current signal

2020 ◽  
Vol 24 (4) ◽  
pp. 3-9
Author(s):  
Dominik Kukla ◽  
Mirosław Wyszkowski
Keyword(s):  
Comparative Analysis ◽  
Cross Sections ◽  
Eddy Current ◽  
Eddy Currents ◽  
Induction Hardening ◽  
Current Method ◽  
Current Signal ◽  
Eddy Current Method ◽  
Lift Off ◽  
Non Destructive

The work concerns the assessment of the possibility of identifying changes in hardness of carburized and induction hardened layers using the eddy current method. The tests were carried out on three sets of samples, made of AMS 6414 steel, with different layer thickness, subjected to induction hardening and tempering in a wide temperature range, to obtain differences in layer hardness for each set. The samples of each set, with the layers with a hardness in the range of 760–920 HV, were subject to testes using eddy currents which consisted in the assessment of phase angle changes obtained as a result of the lift – off effect. Standard hardness measurements on the surfaces of the hardened layers were also carried out, and microhardness profiles were made on the cross-sections of the samples. The results of hardness measurements were subject to comparative analysis with the results of non-destructive tests and on this basis it was possible to identify changes in the hardness of layers, based on the results of non-destructive tests.

scholarly journals Use of non-destructive eddy current technique to detect simulated corrosion of aircraft structures

2020 ◽  
Vol 64 (2) ◽  
pp. 52-58
Author(s):  
M. Janovec ◽  
J. Čerňan ◽  
F. Škultéty
Keyword(s):  
Eddy Current ◽  
Current Method ◽  
Experimental Sample ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Eddy Current Method ◽  
Aircraft Structures ◽  
Aluminum Sheets ◽  
Riveted Joints ◽  
Non Destructive

AbstractThe article deals with the issue of non-destructive testing of riveted joints. In the article, the authors used a non-destructive eddy current array technique, which was applied to detect simulated corrosion in the field of aircraft riveted joints of aluminum sheets. In aircraft maintenance, the eddy current method is used to control the outer surface of the aircraft skin, especially the areas around the riveted joints. This method makes it possible to detect hidden cracks and corrosion that may occur during aircraft operation. Especially hidden are hidden cracks and corrosion of aircraft structures, which cannot be detected during a visual inspection of the aircraft. The aim of the experimental measurements was to reveal simulated corrosion in the area of riveted joints formed on the experimental sample. Corrosion was simulated by gluing aluminum powder to the surface of the aluminum sheets from which the sample was made. The simulated corrosion in the second and third layers of the riveted sample was reliably detected. The settings, the method of control and the results of measurements are given in the article in the experimental part and the results of measurements. Measurements were performed using a defectoscope with an ECA measurement module, with appropriate measuring probes suitable for this type of inspection.

scholarly journals Non-destructive testing of Al-Mg alloys by using the eddy-current method

2017 ◽  
Vol 106 ◽  
pp. 03007 ◽  
Author(s):  
Sergey Dmitriev ◽  
Alexey Ishkov ◽  
Alexander Katasonov ◽  
Vladimir Malikov ◽  
Anatoly Sagalakov
Keyword(s):  
Eddy Current ◽  
Current Method ◽  
Mg Alloys ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Eddy Current Method ◽  
Non Destructive ◽  
Al Mg Alloys

Electromagnetic Effect of Eddy Currents in Composites with Conductive Components: Magnetic Field Strengthening and its Simple Analytical Estimation

2018 ◽  
Vol 284 ◽  
pp. 37-42 ◽  
Author(s):  
R.R. Sattarov ◽  
T.A. Volkova ◽  
I.Z. Gubaydullin
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Compatibility ◽  
Eddy Currents ◽  
Electromagnetic Effect ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Compatibility Analysis ◽  
Dynamic Materials ◽  
Analytical Estimation ◽  
Non Destructive

Composites and dynamic materials that include conductive components are becoming a suitable choice in different applications. The eddy currents are generated when the conductive components are placed in alternating magnetic field. The eddy currents decrease the primary field and this effect has been well studied and it is used for electromagnetic shielding. Besides, the magnetic field increases in small space near edges of the conductive components. While this effect of magnetic field strengthening is known, it is rarely examined. We will introduce a simple model that can be appropriate for the conductive components in form of long thin sheets. We analytically analyze the model and obtain expressions that give upper bounds for increasing of the net magnetic field. The electromagnetic effect of strengthening should be taken into account when considering an application of the composites. The results are useful for electromagnetic compatibility analysis, non-destructive testing and monitoring of composite and dynamic materials with conductive components.

Technical Note: Detection of delamination in tyres using eddy currents

1997 ◽  
Vol 211 (1) ◽  
pp. 79-82 ◽  
Author(s):  
X. E. Gros
Keyword(s):  
Eddy Currents ◽  
Structural Integrity ◽  
Low Cost ◽  
Technical Note ◽  
Quality And Safety ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Safety Standards ◽  
Current Testing ◽  
Non Destructive

Non-destructive testing (NDT) is a useful tool to assess the structural integrity of components in order to maintain quality and safety standards. A low-cost electromagnetic technique based on eddy currents induced into a material appeared promising for the inspection of composite materials. Experiments were carried out in order to assess the potential of eddy currents in detecting delamination in rubber tyres. Infrared thermography was used to verify inspection results achieved with eddy currents. Non-destructive examination results are presented in this paper; these confirm that eddy current testing is an economically viable alternative for the inspection of steel reinforced truck tyres.

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