Which NDT method uses radiation to detect internal flaws?

Radiographic Testing (RT) is the non-destructive testing method that utilizes radiation to detect internal flaws within a material. This technique involves the use of gamma rays or X-rays, which penetrate the material and create an image on a film or digital sensor. Any internal defects, such as cracks or voids, will appear as variations in density on the radiograph, allowing the inspector to identify issues that may not be visible on the surface.

Understanding how RT works is vital, particularly because it provides a permanent record of the inspection in the form of radiographs, which can be archived and reviewed later for quality control and analysis. This capability to see inside a material without breaking it open is what distinguishes RT from other non-destructive testing methods, which may only evaluate surface conditions or rely on different principles.