Abstract
1. The mechanical properties of the examined steels in static and cyclic loading change under the effect of plastic deformation but no correlation has been found between these changes. 2. Preliminary hardening of the steels characterized by low capacity for strain hardening in static loading slightly increases their fatigue resistance in air (by less than 30%). 3. The corrosion fatigue resistance tends to vary after plastic deformation of the steels in relation to their strain capacity. After hardening (22–29%) the resistance to corrosion failure at 105 cycles increases in the 40Kh, 07GSYuFT, and 08GSYuT steels (parameter A decreases) and decreases for 08kp, 20Kh13, and 14Kh17N2 steels (the value of A increases or remains almost constant). 4. Irrespective of the treatment method and lower values of the yield and tensile strength, 08kp steel has a higher resistance to fatigue in air and in a corrosive medium than the 08GSYuT and 07GSYuFT alloy steels.
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