Ultrasonic Wave Propagation through an Interface with a Step Discontinuity
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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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Abstract
The condition of an interface through which an ultrasonic wave passes as it enters a material is an important factor in ultrasonic nondestructive evaluation. Most modeling studies of ultrasonic inspection assume that this interface is smooth. However, in real life this may not be the case. In the case of nuclear reactor components, factors such as weld overlay, claddings, grinding and diametrical shrink can give part surfaces a wavy, corrugated or abruptly stepped topography. M. S. Good [1] has provided some estimate of what surface conditions exist in nuclear reactor components, with some examples being illustrated in Fig. 1. These irregular surfaces can severely distort or redirect the ultrasonic beam, leading to false indications of size and location of defects.