Cyclic endurance thermocyclic damage of 0.04C-16Cr-11Ni-3Mo-0.05Ti steel unirradiaded and neutron irradiated steel

Isothermal mechanical and thermal fatigue of austenitic 0.04C-16Cr-11Ni-3Mo-0.05Ti steel in the temperature range 20 to 350deg C has been studied. The effect of neutron irradiation to a fluence of 2x1026n/m2 (E > 0.1 MeV) at Tirr ≅ 350deg C on the thermocyclic damage of steel has been investigated. It has been shown that change in mechanical loading, test temperature, strain frequency, neutron irradiation has no effect on cyclic endurance of steel both under isothermal and thermocyclic loading conditions. Non-isothermal deformation conditions result in significant reduction of the endurance of steel under consideration. (orig.)