Full characterization of near-surface flaws with multimode straight-beam transducers
Is Version Of
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.
Reliable and accurate characterization as to type (cracks vs. others), location (highly stressed zone or not), and size of potential flaws in cladded pressure vessels by ultrasonic methods ensures the integrity of these structures. Vessel integrity is primarily affected by the presence of fatigue cracks in the highly stressed near- surface regions (Zones 1 and 2). While there have been some new high- and low- beam multimode transducer developments for characterizing Zone 2 (underclad) and Zone 3 (deeply buried) flaws, respectively [1,2], emphasis has recently been placed upon fully characterizing manufacturing flaws in the cladding (Zone 1) because they can initiate fatigue cracks.