when-is-a-weak-point-a-flaw-limiting-lcfHow large may a weak point be before it becomes a flaw? Flaw limits of LCF-stressedparts:log KCrack growth rate a/ n"Paris diagram"KthNo crack growthCrack size aLife span(load cycles)InitialsizeFlaw not capableof growthIncubation period beforecrack growthCrack growthfrom the firstload cyclesProcedure according to the designphilosophyCCAABBSlow crack growthRapid crack growth1210810410-410-8110-310-210-1101OxidesCarbideCoated grainboundariese.g. 1 objectper literSlag inclusions,segregationFlaw size "a" [mm]Number of flawsper litertypische Fehlerverteilungen bei Ni-ScheibenwerkstoffenFlaw sizeDetectabilityUndetectedflaws1034PM materialsForged materials