Ultrasonic testing according to the tandem method
Ultrasonic testing using the tandem technique uses two probes: one to transmit and one to receive sound. This enables more precise detection of vertically oriented, deeply seated cracks.
Physikalisch-chemischer Wirkmechanismus
Tandem ultrasonic testing uses two probes. The first probe sends sound into the material zone being tested, while the second probe receives the scattered signal. This method gives higher resolution and precision for detecting cracks, especially when they're vertically aligned.
Metallurgical Relevance & Welding Risks
This test is especially important for finding deep or hidden cracks in weld areas. Missing or inadequate ultrasonic tests can create safety risks, because undetected cracks can lead to fractures and component failure.
Werkstattpraxis & Handlungsanweisungen
To run tandem ultrasonic testing successfully, follow these steps:
1. Prepare the material zone: Make sure the test surface is clean and free of dirt.
2. Turn off the equipment: Deactivate the ultrasonic device and make sure all safety devices are on.
3. Position the probes: Place the sending probe on the surface and the receiving probe directly below or parallel to it, depending on the crack direction you're checking.
4. Run the test: Turn on the device and do the ultrasonic test. Watch for signal anomalies that might indicate cracks.
5. Evaluate the results: Analyze the recorded data and assess the test results. Document all relevant information for future reference.