Basic Types of Non Destructive Testing (NDT) methods
• Magnetic Particle Crack Detection
• Dye Penetrant Testing
• Ultrasonic Flaw Detection
• Eddy Current and Electro-magnetic Testing
However, these are by no means the total of the principles available to the N.D.T. Engineer. Electrical potential drop, sonics, infra-red, acoustic emission and spectrography, to name but a few, have been used to provide information that the above techniques have been unable to yield, and development across the board continues.