Imaging the Interaction of Multibeam/Multimode Ultrasonic Transducers with Manufacturing and Service-Induced Flaws

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1989
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Gruber, George
Hamlin, Dennis
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

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Type, through-wall dimension (depth), and location are the most important flaw characteristics that need to be determined for the fracture-mechanics evaluation of a flawed component or part. In this paper, the three-step approach to the ultrasonic evaluation of flawed reactor pressure vessel components (i.e., flaw detection, identification, and sizing) are discussed in relation to fatigue cracks, slag inclusions, incomplete fusion flaws, and porosity clusters. The emphasis is on flaw identification (cracks vs. benign flaws) which must take place before estimating the depth of the flaw. The composite pulse patterns obtained with four multibeam/multimode SLIC transducers [1] for two model flaws (a side-milled notch and a side-drilled hole) and two real flaws (fatigue crack and slag inclusion) are imaged in a B-scan format.

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Sun Jan 01 00:00:00 UTC 1989