Eddy Current Frequency Multiplex Testing
Eddy current frequency multiplex testing feeds several frequencies into a test coil at the same time to combine depth and surface analysis. This reduces testing time for detecting near-surface cracks.
Physical-Chemical Mechanism of Action
Eddy current frequency multiplex testing uses different frequencies to analyze different depths and structures in a workpiece. Each frequency responds differently to the material structure, making it possible to detect both deeper and near-surface defects at the same time.
Metallurgical Relevance & Risks in Welding
This test is especially helpful for quality assurance of weld seams. It can detect cracks and surface coatings as well as deeper material defects, which increases the reliability of the workpiece. Incorrect execution or lack of calibration can lead to inaccurate results, which in turn can cause wrong decisions in quality assurance.
Workshop Practice & Instructions
To successfully perform eddy current frequency multiplex testing, follow these steps:
1. Calibrate the test coil: Make sure the frequencies are set correctly and the sensors are clean.
2. Set test parameters: Select suitable frequency ranges based on the workpiece and the expected defects.
3. Run the test: Perform the test according to the set parameters and document results accurately.
4. Evaluate data: Analyze the data to identify deeper and near-surface defects and take appropriate actions.