Study on the Effect and Mechanism of Hydrogen Content on the Creep Fatigue Behavior of Zirconium Alloy
This study investigates the creep-fatigue behavior of recrystallized zirconium alloy at 320℃ and different hydrogen contents using frequency-corrected strain life and frequency-corrected hysteresis energy methods.The results indicate that as the holding time increases,the creep-fatigue resistance of the non-hydrogen permeation sample decreases,but there is no significant effect when holding time exceeds 30 s.However,the effect of holding time on the creep-fatigue resistance of hydrogen permeation sample is not significant.It was found that the non-hydrogen permeation sample had the best creep-fatigue resistance,while the 0.04％hydrogen permeation sample had the worst resistance.The creep-fatigue resistance of the 0.005％hydrogen permeation sample was weaker at high strain levels(high hysteresis energy)than that of the 0.02％hydrogen permeation sample,and better than that of the 0.02％hydrogen permeation sample at low strain levels.The effect mechanism of hydrogen content on creep-fatigue behavior:solid solution hydrogen can increase creep-fatigue life,while hydrides can reduce creep-fatigue life.The hydride plays a dominant role in the sample with hydrogen content of 0.04％,resulting in the worst creep-fatigue performance.
zirconium alloycreep-fatiguehydrogen permeationhysteresis energy
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万方数据
维普
