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- W2621059653 abstract "The mechanical behavior of ductile cast iron is governed by graphite particles and casting defects in the microstructures, which can significantly decrease the fatigue strength. In our previous study, the fatigue limit of ferritic-pearlitic ductile cast iron specimens with small defects () could successfully be predicted based on the parameter model by using as a geometrical parameter of defect as well as the tensile strength as a material parameter. In addition, the fatigue limit for larger defects could be predicted based on the conventional fracture mechanics approach. In this study, rotating bending and tension-compression fatigue tests with ferritic-pearlitic ductile cast iron containing circumferential sharp notches as well as smooth specimens were performed to investigate quantitatively the effects of defect. The notch depths ranged 10 ∼ 2500 μm and the notch root radii were 5 and 50 μm. The stress ratios were R = −1 and 0.1. The microscopic observation of crack propagation near fatigue limit revealed that the fatigue limit was determined by the threshold condition for propagation of a small crack emanating from graphite particles. The fatigue limit could be successfully predicted as a function of R using a method proposed in this study." @default.
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- W2621059653 date "2017-05-01" @default.
- W2621059653 modified "2023-09-26" @default.
- W2621059653 title "Fatigue limit prediction of ferritic-pearlitic ductile cast iron considering stress ratio and notch size" @default.
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- W2621059653 doi "https://doi.org/10.1088/1742-6596/842/1/012067" @default.
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