Title :
Microwave detection of third-order nonlinearities in fatigue cracks
Author_Institution :
SRI International, Remote Measurements Laboratory, Menlo Park, USA
Abstract :
The results of an experiment aimed at demonstrating the possibility of detecting third-order electromagnetic nonlinearities in tight fatigue cracks are described. The postulated non-linearity was found to exist in specimens of aluminium and stainless steel using a two-frequency system operating near 10 GHz. This phenomenon could prove to be useful for non-destructive evaluation.
Keywords :
aluminium; crack detection; fatigue cracks; microwave measurement; nondestructive testing; stainless steel; Al; NDT; crack detection; microwave detection; nondestructive testing; operating near 10 GHz; stainless steel; third order nonlinearities; tight fatigue cracks; two frequency system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19800110
