Eddy Current Testing Level II Course Outline
- Fundamentals
- Electromagnetic field generation
- Properties of eddy current
- Effects of varying frequency
- Phase discrimination
- Sensors Electromagnetic testing
- Basic types of equipment; types of read out
- Reference standards
- Applications and test result interpretation
- Flaw detection
- Conductivity and permeability sorting
- Thickness gauging
- Process control
Advantages of Eddy Current Testing
- Eddy current Test probe does not need to contact the part
- Eddy currents Inspects complex shapes and sizes of conductive materials
- Eddy currents are Sensitive to small cracks and other defects
- Eddy current testing detects surface and near surface defects
- This Method can be used for much more than flaw detection
- Minimum part preparation is required
- Eddy current Inspection gives immediate results
- ET Equipment is very portable
Limitations of Eddy Current testing
- Eddy current inspection is suitable for only conductive materials
- Surface must be accessible to the Eddy current probe/s
- Skill and training required to carry out eddy current inspection is more extensive than other techniques
- Surface finish and roughness may interfere with test results
- Reference standards needed for setup for every application
- Depth of penetration is limited
- Flaws such as de-laminations that lie parallel to the probe coil winding and probe scan direction are undetectable and may get detected only using specially designed Eddy current probes for such applications.
