Which type of flaw can be detected by both Ultrasonic Testing and Radiographic Testing?

Weld defects can indeed be detected by both Ultrasonic Testing (UT) and Radiographic Testing (RT), making this the appropriate choice.

Ultrasonic Testing utilizes high-frequency sound waves to identify internal flaws in materials, such as those found in welds. It is particularly effective for detecting lamination, lack of fusion, and other discontinuities within the weld. This method can provide a two-dimensional view of the defect's size, shape, and location, especially in thick materials.

On the other hand, Radiographic Testing employs X-rays or gamma rays to penetrate materials and create an image on film or a digital detector. This method is useful for visualizing the internal structure of a weld and can reveal voids, slag inclusions, and other types of internal defects. RT is excellent for assessing the overall quality of welds and identifying areas that do not conform to acceptable standards.

Both methods are non-destructive and can provide critical information about the quality of welds in various applications, making them complementary techniques for ensuring structural integrity.