Abstract
In combination with a universal eddy-current equipment G_<iant>M_<agneto>R_<esistance> sensors were used for the on-line monitoring of fatigue processes. The paper contains selected examples for the successful application of the GMR technique to different austenitic stainless steels as well as plain carbon railway wheel and tire steels under HighCycleFatigue-conditions at ambient temperature in servo-hydraulic testing systems. For the characterization of the cyclic deformation behavior furthermore the recording of mechanical hysteresis loops as well as temperature-measurements and voltage-measurements were used.
