中文摘要：

超高周疲劳的研究可以满足某些特殊零部件极高循环周次的要求。综述了近年来超高周疲劳的研究进展，从S-N曲线的特征、断面上的鱼眼形貌以及裂纹的萌生与扩展特征等方面介绍了超高周疲劳的典型特征。分析了影响超高周疲劳的若干因素，如氢的作用、加载频率、应力比和晶粒尺寸等。进而提出了一些今后超高周疲劳的研究方向：超高周疲劳裂纹扩展的微观机理、扩展速率尤其是微观、宏观上的控制参量的研究以及确定鱼眼与ODA区边缘的应力强度因子范围对内部裂纹扩展门槛值的影响作用。

英文摘要：

The research of ultra high cycle fatiguecan be helpful for some special parts, which are required for extremely high cycle number. The research progress of ultra high cycle fatigue in last decade is reviewed. The typical characteristics of the ultra high cycle fatigue are introduced, such as the characteristics of S-N curves, fish eye morphology on the section and the characteristics of the crack initiation and extension. The influencing factors on ultra high cycle fatigue, such as the effect of hydrogen, loading frequency, loading mode and grain size are analyzed. Future research directions of ultra high cycle fatigue, including microscopic mechanism of very high cycle fatigue crack propagation, extending rate （especially the research on the micro and macro control parameter）, the effect of fish-eye and the stress intensity factor range of the edge of ODA area on internal crack extended threshold are put forward.