Effect of structure on the fatigue strength of dispersion-hardened condensates based on copper - III. Analysis of the second coefficient of a Mott-Stroh type relation and data on strength under static loading

The second coefficient of the Mott-Stroh type equation is considered as the stress intensity factor in a microcrack edge under external cyclic stresse s and infernal ones. The individual length of a critical microcrack is defi ned more exactly for some dispersion-hardened materials relatively to their average value. The experimental equations for dependences of a limit of st rength and yield point in three groups of the materials in question are ana lyzed using structure parameters in two levels.