Abstract
A study of fatigue crack growth kinetics in aluminum alloy AMg-6 in gigacycle fatigue mode at preliminary dynamic deformation has been carried out. The relevance of the statement is determined by the critical applications of estimating materials and structural elements resource of aircraft gas turbine engines in terms of flight cycle with random dynamic effects. Preliminary loading of samples was carried out by the dynamic tension on Hopkinson-Kolsky rod split at strain rates up to ~103 s-1 subsequent gigacycle loading on the ultrasonic testing machine Shimadzu USF-2000 quantitative analysis and fractography of fractures based on the data from profilometry and scanning electron microscopy. The authors propose an original form of kinetic equation which relates the rate of the fatigue crack growth with changes in the stress intensity factor. The scale invariance of defect structures responsible for the formation of the fracture surface relief under gigacycle fatigue loading was found out to be related to the power exponent of the Paris law.
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.
