Studies on Impact Fatigue : Part V, Impact Fatigue Strength of 0.22%C Carbon Steel under-100°C Low Temperature Atmosphere

抄録

As a sequel of the impact fatigue investigation in 150 C low temperature atmosphere, a series of the fatigue tests in -100 C low temperature atmosphere were conducted. It was revealed that the impact fatigue strength became higher than the ordinary fatigue strength in the whole range of the stress cycles experimented, and this strength behavior can be interpreted such that the strain aging is hard to occur under both load conditions in such a low temperature atmosphere of -100 C, so that the fatigue strength is determined by the accumulation of the hysteresis energy only.