采用光滑圆棒和中心孔板片试样,对GH901合金室温高低周复合疲劳进行了系统的研究。结果表明,如按一定方式分解复合循环波形,则利用线性累积损伤规律能较准确地预测复合循环疲劳寿命;复合循环下的疲劳裂纹扩展速率按线性迭加法和均方根应力强度因子变程法,能作出比较准确的预测。 The smooth round bar and center hole plate samples were used to systematically study the composite fatigue of GH901 alloy at high and low temperature at room temperature. The results show that if the composite cycle waveform is decomposed in a certain way, the cumulative cyclic fatigue life can be more accurately predicted by the linear cumulative damage law. The fatigue crack growth rate under the combined cycle is determined by the linear superposition method and the root mean square stress intensity factor method , Can make a more accurate prediction.