Abstract
1. A reduction in test temperature leads to an increase in resistance to the development of fatigue cracks in 10GN2MFA steel over the whole investigated range of change in KI from the minimum value corresponding to the advance of the crack by 5–7·10−7, mm/cycle to critical values of KIC. 2. For samples of complex configuration in which the form of a fatigue crack changes during its development the numerical values of the coefficients n and C depend upon the parameters in which the characteristic dimension, of the crack (l h, F) is expressed but the tendency toward a change in the rate of development of fatigue cracks is generally maintained.
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