Measurement of Acoustoelastic Coefficient of Surface Waves with Scanning Acoustic Microscope
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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
A Scanning Acoustic Microscope (SAM) is a device used to identify the difference of the local acoustic properties at surface or subsurface of solid materials using high frequency surface wave, usually above 100 MHz. The major function of the SAM is to visualize the internal microstructures of materials. The other is to measure the surface wave velocity with the V(Z) curve. If the surface wave velocity could be accurately measured using the V(Z) curve, it is possible to evaluate the surface stresses within very localized region with the acoustoelastic law.