Ultrasonic imaging of welds using boundary reflections

Ultrasonic imaging can be applied for the inspection of welds to determine the type, position, and size of defects. By including boundary reflections in the path from transmitter to receiver, defects in the weld can be imaged from different directions using both reflection and diffraction signals. These images can be combined into a single figure providing a section view of the weld. The geometrical configuration must be taken into account for proper alignment of the sub-images. These sub-images can be linked to conventional ultrasonic inspection techniques, such as the phased array tandem technique and time of flight diffraction.