Acoustic Microscopy Wall Thickness Measurements on Nickel Based Superalloy Gas Turbine Blades
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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
In the manufacture of hollow jet engine turbine blades, monitoring the wall thickness is an important component of quality control. Because of the inaccessibility of the inner air channel to mechanical probing, ultrasonics provides one of the few means by which the necessary measurements can be done. The complex shape of the blades and the fact that they are often acoustically anisotropic make this a challenging problem. Alternative techniques have been investigated[1] for the wall thickness measurements but ultrasonics still presents the best option, and hence the continued interest in this problem[2].