Equivalent flaw time-of-flight diffraction sizing with ultrasonic phased arrays

Date
2012-07-01
Authors
Engle, Brady
Schmerr, Lester
Sedov, Alexander
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Abstract

Ultrasonic phased array transducers can be used to extend traditional time-of-flight diffraction (TOFD) crack sizing, resulting in more quantitative information about the crack being obtained. Traditional TOFD yields a single length parameter, while the equivalent flaw time-of-flight diffraction crack sizing method (EFTOFD) described here uses data from multiple look-angles to fit an equivalent degenerate ellipsoid to the crack. The size and orientation of the equivalent flaw can be used to estimate the actual crack size.

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<p>Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.</p> <p>This article appeared in <em>AIP Conference Proceedings </em>1511 (2013): 895–901 and may be found at <a href="http://link.aip.org/link/doi/10.1063/1.4789139">http://dx.doi.org/10.1063/1.4789139</a>.</p>
Keywords
crack detection, ultrasonic diffraction, ultrasonic materials testing, ultrasonic transducer arrays, nondestructive evaluation, QNDE, Aerospace Engineering
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