Impedance plane
The impedance plane is a graphical representation of the electrical resistance and inductance of an eddy current probe. It helps with flaw detection and material identification.
Physical-Chemical Mechanism
The impedance plane shows the relationship between the electrical resistance (R) and inductance (L) of an eddy current probe. These values change depending on the material and type of flaw.
Metallurgical Relevance & Welding Risks
The impedance plane is used to distinguish different metals and materials, and to detect possible weld flaws like porosity or lack of fusion. Misinterpretation can lead to missed defect detection.
Workshop Practice & Instructions
To use the impedance plane correctly, calibrate the probe regularly. Plot the measured values on the corresponding diagram and compare them with reference curves. If deviations from normal values occur, a detailed flaw analysis is required.