| Abstract: | | 1. | Single plastic prestraining leads to a decrease of the threshold level of the stress intensity factor range of alloys if they do not form pores or microcracks during deformation. These structural defects cause stress relaxation or crack tip blunting which causes an increase in the threshold level of the SIF. | | 2. | A material classification is presented which is based on sensitivity of FCG rate in the middle section of the kinetic diagram of fatigue failure to the degree of prestraining Cold deformation, rolling, or tensile tension increases the FCG rate of cyclic hardened materials ( u/0.2>1.5) and decreases it for cyclic softened or cyclic stable materials. |
Institute of Strength Problems, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Problemy Prochnosti, No. 12, pp. 14–18, December, 1988. |
