Abstract
In this paper a quantitative NDE (non-destructive evaluation) method for defects on steel plates based on MFL (magnetic flux leakage) testing is studied. This evaluation method is implemented by finding the mapping relationship between the results of electromagnetic simulation and that of the MFL detection experiments. The experiments are carried out on steel plates with rectangular cracks, and different ways of modeling are explored in order to fit the experiment results. By extracting two characteristics, a high-resolution database can be obtained from simulation results for the evaluation of crack width and depth. It is proved that the proposed method has a high accuracy of crack evaluations in the actual MFL testing.
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