Use of surface acoustic waves for the detection of modifications produced by deformation fatigue or corrosion on metallic surfaces
Abstract
This paper describes a new method that uses Rayleigh waves in a feedback arrangement to study metallurgical phenomena such as micro-deformation, fatigue or corrosion. The acoustical method is two hundred times more sensitive than resistive strain gauges for measuring deformation by static flexure. It is also possible to detect the initiation and growth of fatigue failure by means of Rayleigh-wave attenuation variation. For corrosion, Rayleigh-wave frequency variations and attenuation variations seem appropriate, but this latter parameter might be characteristic of cold working.
- Publication:
-
In: Ultrasonics international 1975; Proceedings of the Eleventh Conference
- Pub Date:
- 1975
- Bibcode:
- 1975ulin.proc..102P
- Keywords:
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- Metal Surfaces;
- Rayleigh Waves;
- Surface Acoustic Wave Devices;
- Test Equipment;
- Corrosion Resistance;
- Cyclic Loads;
- Fatigue Tests;
- Plastic Deformation;
- Surface Defects;
- Transfer Functions;
- Wave Attenuation;
- Instrumentation and Photography