Nondestructive testing of pitting corrosion cracks in rivet of multilayer structures

This research proposes an ultrasonic testing method for inspecting pitting corrosion cracks in a rivet of multilayer structures. The system is a combination of a magnetic sensor array and an ultrasonic sensor. The magnetic sensor array is used to automatically measure the presence of a rivet and its...

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Bibliographic Details
Published in:International journal of precision engineering and manufacturing 2016-11, Vol.17 (11), p.1433-1442
Main Authors: Le, Minhhuy, Kim, Jungmin, Kim, Sejin, Lee, Jinyi
Format: Article
Language:English
Subjects:
Engineering
Industrial and Production Engineering
Materials Science
Nondestructive testing
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Summary:This research proposes an ultrasonic testing method for inspecting pitting corrosion cracks in a rivet of multilayer structures. The system is a combination of a magnetic sensor array and an ultrasonic sensor. The magnetic sensor array is used to automatically measure the presence of a rivet and its center position. Then, the ultrasonic sensor is guided to the rivet center in order to inspect pitting corrosion cracks in the rivet. The magnetic sensor uses a 64-Hall sensor elements array with a 0.52-mm interval that can measure the rivet center position at a standard deviation of 0.27 mm and 0.42 mm in the scan and sensor directions, respectively. The ultrasonic signal is analyzed in the frequency domain using the short-time Fourier transform that helps better observe the presence of cracks compared with the conventional signal analysis in A-scan present.
ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-016-0169-7