The fatigue crack growth behavior of the newly developed GH4169 nickel-based alloy at a maximum stress of700 MPa and different stress ratios was investigated in the present work employing the specimens with a single micronotch at a frequency of 129 Hz at room temperature. The results demonstrate a typical three-stage process of fatigue crack propagation processing from the microstructurally small crack(MSC) stage to the physically small crack(PSC) stage, and finally to the long crack stage. The ...

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