Abstract
The influence of high cyclic vibrations on the low cycle fatigue (LCF) behaviour and its microscopic morphology for an Fe-Ni alloy GH36 is described in this paper. From a study of superposition of a low amplitude high cyclic loading on a stress hold LCF, it is found that the fatigue crack propagation process may be divided into two regions: a) the deceleration region, in which the fatigue crack propagation rate (FCPR) depends primarily upon the low cyclic loading; b) the acceleration region, where the amplitude of the high cyclic loading becomes a predominant factor controlling the FCPR. A transition of FCPR at stress ratio m=0.06 was found between these two regions. The crack propagation behaviour of the combined cycle fatigue (CCF) can be ascribed to the interaction among high cycle fatigue (HCF), LCF and creep during the combined fatigue testing. The microscopic observation and fractographic analysis of these stress hold LCF and CCF specimens are discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
