Angle beam probe
An angle probe sends sound waves obliquely into the component to detect lack of fusion or cracks. The sound direction enables precise localization and characterization of defects.
Physico-chemical mechanism of action
An angle beam probe generates sound waves that enter the component at an angle. These sound waves are reflected by surfaces or internal defects and are picked up again by the probe. The time difference between the emission of the sound and its return provides information about the location and type of defects.
Metallurgical relevance & risks during welding
Angle beam probes are especially useful for testing welds for lack of fusion or cracks. Incorrect settings can lead to inaccurate results, which can cause misunderstandings and potential defects in the component.
Workshop practice & instructions
Use an angle beam probe with a sound velocity of 5900 m/s for steel. Set the probe at an angle of 15° to 20° to the weld flank. The distance between the probe and the weld should be 3 to 5 mm. Scan the entire length of the weld with a step size of 1 cm.