Abstract:The influence of pro-eutectoid cementite (θ) on fatigue crack growth behavior was investigated using various pearlitic steels containing from 0.64 to 1.21 mass% C. The fatigue crack growth rates of the hypoeutectoid and eutectoid pearlitic steels hardly changed, while that of the 1.21 mass% C steel having a large amount of pro-eutectoid θ was accelerated, especially in the high stress intensity factor region. Scanning electron microscope (SEM) observation revealed that the fatigue fracture surface of the 1.21 … Show more
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