1988 年 37 巻 413 号 p. 185-190
The environmental influences on fatigue strength at high temperatures and creep strength of Hastelloy XR were investigated by using the specimens corroded in helium gas with impurities. The corrosion fatigue strengh at high temperatures in helium gas with impurities was also estimated from the method proposed previously by the authors, and another method proposed in the present study. The latter method assumes that the reduction ratio of fatigue strength at high temperatures in a corrosive environment to that in vacuum is equal to the total of the reduction ratio of fatigue strength due to the aging effect and that due to only the corrosion effect.
The estimated corrosion fatigue strength by the latter method was in good agreement with the estimated result by the former method, which can be applied to the estimation of corrosion fatigue strength at high temperature.