Abstract:We present a probabilistic model for quantifying the number of load cycles for nucleation of forging flaws-for a 3.5NiCrMoV high strength low alloy rotor steel-into a crack under gas turbine operating conditions. The model correlates low cycle fatigue data, ultrasonic testing indication data, flaw morphology, and type with the nucleation process. This paper is the third of a series of publications presenting this modeling approach progressively. It focuses on the effect of temperature variation on the nucleati… Show more
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