The influence of preliminary low-cycle overloads on the fatigue fracture resistance in the stages of formation and propagation of cracks in cyclically hardened steels is studied. The regular features of changes in the structural state under the overloads and its relation to the stress-strain diagram are determined using metallographic and x-ray diffraction analyses. The prehistory of the process of fatigue loading is shown to affect the kinetics of the accumulation of damage and the mechanism of fatigue fracture of the steel.

中文翻译：

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低周超载下结构材料的循环断裂研究

在循环硬化钢的裂纹形成和扩展阶段，初步研究了低周超负荷对疲劳强度的影响。使用金相和X射线衍射分析确定了过载下结构状态变化的规律特征及其与应力-应变图的关系。研究表明，疲劳载荷过程的前史影响着损伤累积的动力学以及钢的疲劳断裂机理。