Ultrasonic Transducer
An ultrasonic probe converts electrical signals into sound waves and captures reflected echoes to detect internal material defects. It is an essential part of non-destructive testing.
Physicochemical mechanism of action
An ultrasonic probe consists of a transducer that converts electrical pulses into sound waves and vice versa. These waves are directed through the material to be tested and reflected at density changes. The probe picks up these echoes and converts them back into electrical signals.
Metallurgical relevance & risks in welding
Ultrasonic testing is crucial for detecting internal defects such as cracks, pores, or lack of fusion. Incorrect probe settings can lead to inaccurate results, which can cause misinterpretation and potential safety issues in the structure.
Workshop practice & instructions
To use the ultrasonic probe correctly, the inspector must ensure that the device frequency matches the type and size of the material being tested. The echoes are displayed on a screen, and the inspector should carefully watch for unusual structures or anomalies. If defects are suspected, further investigations should be carried out.