Radiographic Testing (RT) is a type of Non-Destructive Testing that uses X-rays or gamma rays to inspect the internal structure of a material or component. Think of it like taking an X-ray at the doctor's office. When you break a bone, the doctor uses X-rays to see inside your body and check the condition of the bone. Radiographic Testing works in a similar way, but instead of looking at bones, we're looking at materials like metal or concrete.First, you place a source of radiation (like an X-ray or gamma ray source) on one side of the object you're testing. On the other side, you place a piece of film or a digital detector. The radiation passes through the object and hits the film or detector, creating an image.
If there are any internal defects in the object, like cracks or voids, they will block or reduce the amount of radiation that reaches the film or detector. This shows up as a darker area on the image, revealing the location and size of the defect.
So, in simple terms, Radiographic Testing is like taking an X-ray of a material or component to find any hidden defects inside. It's a powerful method that's used in many industries, especially where internal integrity is critical.