is taken from standard
strain-cycling tests,
with tension and compression hold times th. In the case of a
viscoelastic stress strain path, at low strain amplitudes, where plastic deformation disappears, creep damage
dominates due to granular damage and fatigue damage was calculated by a fatigue life curve (tp = 0 h). In the
full elastic-plastic regime at high values of total strain range, creep fatigue damage dominates due to
intergranular damage (Fig. 2). Here, fatigue damage is calculated on the basis of a fatigue life curve based on
creep fatigue experiments with symmetrical hold times. The calculation method provides a detailed algorithm
to determine the parameters, i.e. hold times, of a corresponding standardized experiment with the same failure
life curve, or, vice versa, the interpolation rule to obtain the number of cycles from existing experimental data.