Abstract
This research investigates the impact of defects on the fatigue properties of a selective laser melted Ni-based superalloy at elevated temperatures. Results show that 78.6% of the fatigue failures are initiated by defects, with a larger scatter in fatigue life at lower stress levels. And the coalescence and growth of defects are captured by X-ray computed tomography (XCT). Besides, a quantitative analysis indicates that the fatigue life increases with defect location but decreases with defect size, which is influenced by defect shape. A modified stress intensity range, ΔKL, is proposed, considering the effect of the three factors. Statistical characterization shows larger extreme values for critical defects compared to XCT observation.
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.
