Abstract
This study evaluated the threshold stress intensity factor and fatigue limit according to the microcrack size when microcracks exist in the STS304 steel. In addition, the compressive residual stress was introduced by fiber-delivered laser peening while the harmless crack size was evaluated. The evaluation equation of a new threshold stress intensity factor is proposed that focuses on nonlinear behavior at the fatigue limit, which is substantially lower than the yield stress. This equation was able to evaluate the threshold stress intensity factor and fatigue limit according to the size of the microcrack. The harmless crack size was approximately a=1.2 mm in the residual stress of the x direction and approximately a=1.25 mm in the residual stress of the y direction.
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.
