Level I Course Content:

MANUFACTURING DISCONTINUITIES

• Types of Discontinuities: Inherent, Processing and Service
• Casting Discontinuities: Hot Tear, Cold Shut, Porosity, Shrinkage
• Primary Processing Discontinuities including discontinuities in Rolling, Forging, Drawing, Extruding
• Secondary Processing Discontinuities including discontinuities in Grinding, Heat Treating, Machining, Welding, Plating
• Service Discontinuities:- Erosion, Wear, Fatigue, Corrosion, Creep

GENERAL KNOWLEDGE OF ET

• Electrical Parameters
• Resistance
• Inductance
• Impedance

Electromagnetism

• Faradays Law
• Lenzs Law

Eddy Current Theory

• Generation of Eddy Currents
• Impedance changes by Eddy Currents
• Effect of change of impedance on instrumentation

Impedance Curves

• Conductivity Curve
• Lift Off Curve
• Permeability

Types of Eddy Current Sensing Elements

• Probes
  • Absolute
  • Differential
• Lift-off
• Theory of operation

Materials

• Inspection of Non-Ferromagnetic Materials
• Inspection of Ferromagnetic Materials

Special Probes

• Lift Off Insensitive
• Fastener Probes- Ring Probe

Calibration Standards

• Conductivity Standards
• EDM notch Surface Standards

Applications

• Surface Inspection
• Inspection of Airframes
• Airframe Fastener Inspection
• Turbine Blade Inspection
• Inspection of Petrochemical Piping

Level II Course Content:

Electromagnetic Testing

• 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