Abstract
1. The character of the inelastic behavior of a material during cyclic loading in the high-cycle fatigue region cannot be predicted from quantities characterizing the strainhardening and ductility of the material in static tension. 2. Cyclically hardening materials are distinguished within a given group of metals by higher values of σu/σo.2. However, use of this parameter to classify the metals as cyclically softening, cyclically hardening, or cyclically stable requires first an expansion of the empirical data on fatigue and inelasticity within each group. 3. The level of inelastic strain at the endurance limit, being a characteristic of the ductility of the metal under cyclic loading [8], is not explicitly dependent on the ductility of the material in static deformation. 4. If it is necessary to determine the character and level of inelastic strain of a material in the high-cycle region, specimens should be cyclically loaded according to a stepped loading regime [9].
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