Effects of dissolved hydrogen on low-cycle fatigue behaviors and hydrogen uptake of 316LN austenitic stainless steel in simulated pressurized water reactor primary water

[Display omitted] •Increasing of dissolved hydrogen showed no obvious effect on low-cycle fatigue life.•Increasing of dissolved hydrogen had no effect on degree of dynamic strain aging.•Hydrogen uptake slightly increased with increasing dissolved hydrogen level.•Increasing of dissolved hydrogen had no effect on composition of oxide film. The effects of dissolved hydrogen (DH) on the low-cycle fatigue (LCF) behaviors and the hydrogen uptake inside the samples of 316LN stainless steel were investigated in simulated pressurized water reactor (PWR) primary water with various DH levels at a slow strain rate. DH showed no obvious effects on the fatigue life and no obvious influence of DH on the degree of the dynamic strain aging (DSA) was observed. The hydrogen uptake inside the samples slightly increased with increasing DH level. No obvious difference among the composition of oxide films formed in water with different DH levels was observed.