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Thermomechanical fatigue behavior and lifetime modeling of powder metallurgy superalloy considering phase angle effect
International Journal of Fatigue ( IF 6 ) Pub Date : 2022-07-22 , DOI: 10.1016/j.ijfatigue.2022.107164
Jie Shen , Xiaoan Hu , Dong Mi , Zhengming Qian , Xuefeng Teng , Xing Song , Yun Jiang , Xiangfan Nie

In the present work, the thermomechanical fatigue behavior and life prediction of PM superalloy under various mechanical strain amplitudes and phase angles are investigated. Results demonstrate that the thermomechanical fatigue life is phase angle dependent and the tensile mean temperature is the main factor affecting the TMF life of alternative phase angle. A modified energy-based life prediction model is proposed by considering the effects of phase angle and tensile mean temperature. Moreover, machine learning methods were used for life prediction, and the TMF lifetime at various phase angles was predicted by combining it with RF regression and modified energy model.



中文翻译:

考虑相角效应的粉末冶金高温合金热机械疲劳行为和寿命建模

在目前的工作中,研究了 PM 高温合金在各种机械应变幅度和相角下的热机械疲劳行为和寿命预测。结果表明,热机械疲劳寿命与相角有关,拉伸平均温度是影响交替相角TMF寿命的主要因素。考虑相角和拉伸平均温度的影响,提出了一种改进的基于能量的寿命预测模型。此外,采用机器学习方法进行寿命预测,结合射频回归和修正能量模型,预测不同相角下的TMF寿命。

更新日期:2022-07-22
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