Which method uses X-rays or gamma rays to inspect weld quality?

The method that utilizes X-rays or gamma rays to inspect weld quality is the Radiographic Test. This technique is crucial in non-destructive testing because it allows for the detection of internal flaws, such as cracks, porosity, or lack of fusion, without damaging the weld or the workpiece. During the process, X-rays or gamma rays penetrate the material being tested and create an image on a radiographic film or detector. The resulting image reveals any inconsistencies within the weld, enabling inspectors to assess the quality and integrity of the weld joint effectively.

In contrast, the other methods mentioned serve different purposes. The Macro Test Fusion Zone typically involves examining the surface and cross-section of the weld under magnification to assess the quality visually and determine the extent of fusion. The Guided Bend Test involves bending a welded specimen to ascertain ductility and the soundness of the weld, but it does not provide internal examination. Visual Inspection is a straightforward approach, relying solely on the inspector's eyesight to identify surface defects but does not offer insights into internal weld quality. Thus, Radiographic Testing stands out as a sophisticated method for in-depth examination of welds.