Abstract
In this work the fatigue crack growth behavior of ultrafine-grained high purity nickel, produced by high pressure torsion, was studied. Fatigue crack growth curves of samples with different orientations were measured at two stress ratios. It was found that cracks propagating in two specific directions of the HPT disc show differences up to a factor of four in their fatigue crack growth rate and also deviations in their ΔKth values. By the analysis of stereophotogrammetric images of the fracture surfaces, crack branching and crack deflection were found to be active crack tip shielding mechanisms. Only a small influence of the stress ratio has been observed.
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.
