Phased Array Testing of Austenitic Welded Joints
Phased array testing is an advanced ultrasonic technique for precise inspection of austenitic weld joints. It uses special probes that are wavefront-adapted to penetrate complex coarse-grained structures and detect possible defects.
Physical-chemical mechanism of action
Phased array testing uses low-frequency ultrasonic waves emitted by special probes. These probes can adjust their wavefront, which makes it possible to penetrate complex austenitic structures and precisely locate defects such as cracks or damage.
Metallurgical relevance & welding risks
Austenitic steel has a coarse-grained structure that is highly scattering. This makes classical ultrasonic techniques difficult or unreliable. Phased array testing overcomes this difficulty through its wavefront adaptability and enables reliable testing of welded joints, which increases the safety and service life of components.
Workshop practice & action instructions
To perform phased array testing, you need special ultrasonic equipment with wavefront-adjusted probes. The test should be carried out in a quiet environment to minimize interference. The wavefront is adjusted so that it optimally penetrates the austenitic structure. The results should be thoroughly interpreted and documented to ensure that no defects are overlooked.