Introduction: Non-Destructive testing – Relative Merits and Limitations – NDT vs Mechanical testing. Dry technique and Wet technique – Principle – Applications – Advantages and Limitations.Dyes – Developers – Cleaners. Fluorescent penetrant test.Liquid penetrant inspection.
Radiography: X-rays and Gamma rays, Properties of X-rays relevant to NDT – Absorption of rays – scattering. Types and use of Filters – screens – Geometric factors, Film type and Processing. Characteristics of films graininess, Density, Speed, Contrast. Characteristic curves. Characteristics of Gamma rays – fluoroscopy – X-ray – Radiography.Safety with X-rays and Gamma rays.
Ultrasonic Testing: Types of Ultrasonic Waves – Principles of wave propagation – Characteristics of ultrasonic waves – Attenuation. Production of ultrasonic waves – Couplants. Inspection methods – pulse echo, Transmission and Resonance techniques. Thickness measurement.Types of scanning. Test block – Reference blocks.
Techniques for Specific Purposes: Magnetic particle inspection – Principles – Applications – Magnetization methods – Magnetic particles, demagnetization. Eddy current testing – Thermal inspection Principle, Application – Instrumentation of Thermal Inspection. Holography.Acoustic Emission.Pressure and Leak Testing.Chemical Spot Testing. Spark Testing.