NDTnet 1998 Aug, Vol.3 No.8
Ultrasonic Measurement of a Thermal Fatique Crack Field Manually and with a Simple Handscanner.
J Pitkänen, P. Särkiniemi, P. Kauppinen, H. Jeskanen - VTT Manufacturing Technology, Finland.
Keywords: Chemical, Petrochemical
Abstract
High operation temperature (400-500°C) high pressure about 180 N/mm2 and in some areas of component varying temperature give possibilities for inducing thermal fatigue cracks. Also the flow of the fluid in the tubing is affecting the area and formation of crack field. A component with real thermal crack field was inspected manually and with help of a simple hand scanner. From the measurements SAFT reconstructions were computed. From the SAFT reconstructions and raw data visualizations of the measured data two effects can be seen: formation of a crack face and/or crack tip signal. According to the measurements real cracks have different ultrasonic effects on the received signals.
Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00
Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:
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