Eddy current standards - Cracks versus notches
Abstract
Eddy current tests aimed at evaluating cracks and electron-discharge machined (EDM) notches in 7075-T6 aluminum specimens are described. A comparison of the shape and amplitude of recordings made from both transverse and longitudinal scans of small EDM notches and fatigue cracks showd almost identical results. The signal amplitude and phase angle increased with an increase of EDM notch and crak size. It is concluded that equivalent eddy current results obtained from similar-size surface cracks and notches in aluminum can be used to establish a desired sensitivity level for inspection.
- Publication:
-
Materials Evaluation
- Pub Date:
- October 1992
- Bibcode:
- 1992MatEv..50.1225H
- Keywords:
-
- Eddy Currents;
- Nondestructive Tests;
- Notch Tests;
- Surface Cracks;
- Aluminum Alloys;
- Fatigue Tests;
- Quality Assurance and Reliability