Abstract
The relationship between slip character and resistance to cracking under unidirectional and cyclic loading conditions is discussed for single phase solids free of interstitial effects. Under unidirectional loading, increased difficulty of cross-slip intensifies strain within glide bands, induces planar glide, increases the dependence of the yield stress on grain size, and increases the probability of crack formation. In contrast, under cyclic loading, increased difficulty of cross-slip inhibits the slip processes required for crack initiation and growth at a given stress level. A semi-empirical means for predicting the rate of fatigue crack growth is presented.
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