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Magnetic testing of creep damage shows that there is a correlation between the testing signals and the creep. It is observed that the hysteresis loss and the third harmonic of the testing signals change obviously with the progress of the creep. To explain the experimental phenomena theoretically, Jiles-Atherton magnetization model is tried to predicate the change of the magnetic property. The magnetization curves in presence of the creep are simulated by introducing the microstructure changes due to the creep into the Jiles-Atherton model. By comparison of the theoretical and experimental results, it is shown that the trend of the change of the magnetic property predicated by the simulation agrees with that observed by the magnetic testing.

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