Fatigue and stress induced surface crack detection in metals is an important practical issue. A newly developed microwave inspection approach, using an open-ended rectangular waveguide, has proved to be an effective tool for detecting such cracks. This novel microwave approach overcomes some of the limitations associated with the standard detection methods for surface crack detection. In addition, this approach is applicable to exposed, filled (with a dielectric such as dirt, rust, etc.) and cracks under dielectric coatings such as paint. This paper presents the basic foundation of this surface crack detection methodology along with the ways by which measurement parameters may be optimized for increased detection sensitivity.

Meeting Name

Joint IEEE Instrumentation and Measurement Technology Conference & IMEKO Technical Committee (1996: Jun. 4-6, Brussels, Belgium)


Electrical and Computer Engineering

Keywords and Phrases

Al; Covered Cracks; Crack Detection; Detection Sensitivity; Dielectrics; Dirt; Electric Sensing Devices; Fatigue; Filled Cracks; Inspection; Measurement Parameter Optimization; Metals; Microwave Inspection; Microwave Measurement; Nondestructive Testing; Open-Ended Rectangular Waveguide; Open-Ended Waveguide Probe; Optimisation; Probes; Rust; Steel; Stress; Surface Crack Detection; Waveguide Components

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 1996 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jun 1996