Abstract: We investigated the magnetic behavior of an austenitic
stainless steel with an inherent magnetic sensor under cyclic deformation,
as well as the factors controlling its magnetic behavior. The permeability
properties of type 304 stainless steel (SUS304) specimens subjected to
different prestrains were measured along the longitudinal and width
directions after an arbitrary number of cycles. It was found that the
estimation parameter corresponding to the variation in the permeability
increased and decreased periodically with an increase the number of cycles.
Moreover, after comparing the values of the estimation parameter before and
after stress-relief annealing, it was determined that the internal tensile
stress of the martensite phase generated by the cyclic deformation caused
the estimation parameter to decrease. This suggested that it should be
possible to determine the magnitude of the inelastic strain in SUS304 on the
basis of the inherent magnetic sensor.
