Fatigue & Fracture of Engineering Materials & Structures · 1989 · 16 citations · 21 references
Natural SciencesMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsMetallurgyStructural MaterialsFatigueFracture MechanicsWork HardeningFatigue LifeFatigue Life AssessmentFatigue Life PredictionFatigue PerformanceFatigue TestingFretting FatigueFriction CoefficientSteels
Abstract— —Fatigue tests and fretting fatigue tests of two steam turbine steels at room temperature and 773 K were carried out. The reduction of fatigue life and strength in the fretting test were significant at 773 K as well as at room temperature. The values of the friction coefficient at 773 K was almost equal to those at room temperature. The geometry of the fretting fatigue crack was flat in the early stage of fatigue life where a significant effect of fretting was observed. With increasing crack length and with a reducing effect of fretting, the fatigue crack shape changed to a semi‐circular form. The fretting fatigue lives predicted on the basis of elastic‐plastic fracture mechanics analysis, with the frictional force between the fretting pad and the specimen taken into consideration, agreed well with experimental results at both temperatures.
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