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6. Ultrasonic inspection
Ultrasound is emitted by means of "transducers", most of which operate using the piezoelectric effect (figure 5 ). We analyze the propagation of high-frequency mechanical waves (usually a few Megahertz) within the material making up the part to be inspected.
At the frequencies used (1 to 10 MHz), ultrasound does not propagate in air. To ensure their passage between the transducer and the part to be inspected, a coupling medium must be placed between the two. Two techniques are available to ensure this coupling: contact testing and immersion testing.
6.1 Contact control
The transducer is placed directly on the part to be tested. The acoustic...
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Ultrasonic inspection
X-ray inspection (industrial radiology)
Bibliography
Non-destructive testing. General information. Cahiers de formation. CETIM 3rd edition.
Standardization
Personnel certification
- Non-destructive testing – Qualification and certification of NDT personnel – General principles. - NF EN 473/A1 - 2006-01
CND Vocabulary
- Non-destructive testing – Terminology – Part 1: List of general terms. - NF EN 1330-1 - 1999-08
- Non-destructive testing – Terminology – Part 2: Common terms for non-destructive testing methods. - NF EN 1330-2 - 1999-08 ...
Websites
More comprehensive information on the standards can be found on various websites, such as :
http://www.afiap.org The site of the professional guide to good...
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