Cyclic Endurance and Thermocyclic Damage of 0.04C--16Cr--11Ni--3Mo--0.05Ti Steel Unirradiated and Neutron Irradiated Steel

Isothermal mechanical and thermal fatigue of austenitic 0.04C--16Cr--11Ni--3Mo--0.05Ti steel in the temperature range 20-350 deg C has been studied. The effect of neutron irradiation to a fluence of 2 x 10 exp 26 n/m exp 2 (E > 0.1 MeV) at T sub irr approx = 350 deg C on the thermocyclic damage of steel has been investigated. It has been shown that change in mechnical loading, test temperature, strain frequency, neutron irradiation has no effect on cyclic endurance of steel both under isothermal and thermocyclic loading conditions. Non-isotheral deformation conditions result in significant reduction of the endurance of steel under consideration.