HARDENING BEHAVIOUR OF STAINLESS STEEL 316 DURING FATIGUE WITH THERMAL PULSE

The softening of stainless steel 316 of non-detectable difference in magnitude induced bythermal pulse was found during fatigue with strain amplitude of 1.17×10~(-4) in temperaturerange of 333—573K.And it occurred if the measurements of fatigue with thermal pulse wereperformed in range of 333—503K.However,it will become of the hardening in range of 503—573K.The temperature,at which hardening of the steel induced by thermal pulseemerges in fatigue process,increases with the increasing in strain amplitudes.