The influence of specimen size, polycrystal grain size, and yield point behaviour on the fatigue strength of low-carbon steel

Abstract

I t is shown, by comparison of fatigue and yield strength results previously reported for several materials, that a rational explanation can be given of the seemingly complicated manner in which the fatigue properties of annealed low-carbon steel depend on the number of grains in a specimen cross-section, the polycrystal grain size and the yield point behaviour. This dependence varies according to whether the fatigue stress is greater than, equal to, or less than the yield stress of the same material.