Non Destructive Testing(NDT)
Nondestructive testing (N.D.T.) is the process of inspecting, testing, or evaluating materials, components or assemblies for discontinuities, or differences in characteristics without destroying the serviceability of the part or system. In other words, when the inspection or test is completed the part can still be used. In contrast to N.D.T., other tests are destructive in nature and are therefore done on a limited number of samples ("lot sampling"), rather than on the materials, components or assemblies actually being put into service. These destructive tests are often used to determine the physical properties of materials such as impact resistance, ductility, yield and ultimate tensile strength, fracture toughness and fatigue strength, but discontinuities and differences in material characteristics are more effectively found by NDT.
Non Destructive Test Methods:
Test method names often refer to the type of penetrating medium or the equipment used to perform that test. Current NDT methods are:- Electromagnetic Testing (ET)
- Laser Testing Methods (LM)
- Leak Testing (LT)
- Magnetic Flux Leakage (MFL)
- Liquid Penetrant Testing (PT)
- Magnetic Particle Testing (MT)
- Neutron Radiographic Testing (NR)
- Radiographic Testing (RT)
- Thermal/Infrared Testing (IR)
- Ultrasonic Testing (UT)
- Vibration Analysis (VA)
- Visual Testing (VT).
