Pulse-Echo Ultrasonic Testing
Pulse ultrasonic testing uses high-frequency sound pulses to detect inhomogeneities in metals. The reflections of the ultrasonic waves at interfaces or flaws are evaluated, enabling precise localization and sizing.
Physical-chemical mechanism of action
Impulse ultrasonic testing (IUP) uses high-frequency sound pulses that are introduced into the material. These waves reflect at interfaces or defects within the material and are returned. The time of reflection is measured and can be used to determine the position and size of the inhomogeneities.
Metallurgical relevance & risks in welding
IUP is particularly useful for testing weld areas, as it can detect microscopic defects or inhomogeneities. This is important to ensure that the weld is stable and defect-free. Incorrect interpretations of the results can lead to inaccurate conclusions, which poses risks to the safety of the component.
Workshop practice & instructions
To perform a successful IUP, the following steps must be observed:
1. Set up the device: Use a high-quality ultrasonic device and calibrate it correctly.
2. Prepare the specimen: Make sure the specimen to be tested is clean and free of surface defects.
3. Introduce sound pulses: Introduce high-frequency sound pulses into the specimen and observe the reflections on the ultrasonic screen.
4. Evaluate the results: Analyze the reflection times to determine the position and size of the inhomogeneities.
5. Documentation: Record all relevant data and results for later reference.