Abstract The influence of creep damage on high cycle fatigue (HCF) in Alloy 617 M at 700 °C was investigated by incorporating periodic holds at the (maximum stress (σmax) during HCF cycling. The effect of creep damage in “HCF-creep interaction test” is reflected in the form of specimen failure at stress levels corresponding to the occurrence of run-out observed under pure HCF cycling. However, in-situ precipitation was found to play a major role at longer durations of hold during HCF-creep interaction by enhancing the strength of the material and offsetting the effect of creep damage. On increasing the temperature during the application of hold to 750 °C, the precipitates started coarsening, further augmenting the creep damage, resulting in early failure. Detailed fractography investigations showed significant intergranular cracking which corroborates the effect of creep damage on HCF cycling. In addition to this, oxide and precipitation induced cracking was noticed, bringing out the complex nature of damage evolution in “HCF-creep interaction” tests.

中文翻译：

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蠕变损伤对 617 M 合金 HCF 行为的影响

详细的断口研究显示出明显的晶间裂纹，这证实了蠕变损伤对 HCF 循环的影响。除此之外，还注意到氧化物和沉淀引起的开裂，在“HCF-蠕变相互作用”测试中揭示了损伤演变的复杂性质。