Technical Diagnostics and Non-Destructive Testing, 2018, №01



2018 №01 (05)

DOI of Article 10.15407/tdnk2018.01.06

2018 №01 (07)

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Technical Diagnostics and Non-Destructive Testing №1, 2018, pp. 42-46

Method of electromagnetic-acoustic monitoring of metal products without the «dead zone»

S.Yu. Plesnetsov, G. M. Suchkov

National Technical University «Kharkov Polytechnic Institute», 2 Kirpicheva str., 61002, Kharkov. E-mail: hpi.suchkov@gmail.com
 
 
A method of detection of surface, near-surface and subsurface defects in metal items in a layer up to 30 – 50 mm thick was developed. It was realized with application of a combined electromagnetic-acoustic transducer, one part of which emits pulses of bulk waves, and the second receives surface and bulk waves. Experimental studies of the method and transducer confirmed the high effectiveness of defect detection in the surface layer. Amplitude of received echo-signals relative to the noise level reached 54 dB. Method and transducers can be applied at flaw detection in practically any metal products in manual and automatic mode. 10 References, 3 Figures.
 
Keywords: defect, electromagnetic-acoustic transducer, ultrasonic waves, pulse, surface waves, diffraction, transformation
 
Received: 22.01.2018
Published: 20.03.2018
 
References

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