3601 Fatigue Damage Evaluation of SUS304 by Magnetism Change in Fatigue Process
Details
The change on magnetic properties of sus304 stainless steel has been investigated in fatigue process. The distribution of magnetic field on the sus304 specimen was measured with MI sensor. It was found that the no change on magnetic field distribution was observed in the initial period of fatigue test. The peak of magnetic field intensity was observed before crack was initiated. The magnitude of this peak increases with increasing number of cycles. The location where peak value was observed at first coincides with the location of crack initiation. It was found that the fatigue damage could be evaluated by the change on measured magnetic field, such as the location, occurrence time and magnitude of peak of magnetic field intensity.
