Based on the physical phenomenon that the fatigue cracks initiate along specific slip plane, a slip plane damage‐based low‐cycle fatigue (LCF) lifetime model for the nickel‐based single‐crystal superalloy is established. The predicted results indicate that the lifetime model can reflect the orientation effect. In addition, in order to characterize the dwell‐time dependence of the LCF lifetime, creep damage and compression‐creep damage are introduced to the lifetime model. Finally, the lifetime predictions under LCF loading with tensile dwell time, compressive dwell time and tensile‐compressive dwell time are conducted by employing the lifetime model, respectively. The predicted lifetimes show a good agreement with the experimental data, which verifies the accuracy of the developed lifetime model in this paper.

中文翻译：

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考虑各向异性和停留类型的镍基单晶高温合金基于损伤的低周疲劳寿命预测

基于疲劳裂纹沿着特定滑移面引发的物理现象，建立了基于滑移面损伤的低循环疲劳寿命模型，用于镍基单晶高温合金。预测结果表明寿命模型可以反映取向效应。另外，为了表征LCF寿命的停留时间依赖性，寿命模型引入了蠕变损伤和压缩蠕变损伤。最后，分别采用寿命模型进行了在LCF载荷下具有拉伸停留时间，压缩停留时间和拉伸压缩停留时间的寿命预测。预测寿命与实验数据吻合良好，验证了本文开发的寿命模型的准确性。