Radiography Test

This method of NDT is a technique that uses either x-rays or gamma rays to see the internal structure of a material. High-energy electromagnetic waves penetrate the material. Radiation penetrating the material affects the radiation-sensitive film placed on the other side of the material. When developed, this film reveals the image of the inner part of the material through which the beam passes. The darker areas on the image are evaluated as the indicators of discontinuities.

This method can be used to detect the internal and surface flaws in all metallic or non-metallic materials. In the industry to produce gamma rays Iridium 192, Selenium 75 and Cobalt 60 are being used, for X–ray x-ray tubes are being used.