Abstract
The gigacycle fatigue properties and crack growth behavior of two X80 pipeline steels with different microstructures of acicular ferrite (AF) and dual-phase (DP) were investigated. The experimental results show that the S-N curves of the two steels exhibit continuous declines over 109 cycles without fatigue limits, with fatigue strengths of 428 ± 7 MPa and 363 ± 8 MPa respectively. Most fatigue cracks in the DP steel initiated from the surface, while the fatigue fracture of the AF steel was mainly initiated in the internal inclusions. The DP steel exhibited a higher fatigue crack growth (FCG) rate than the AF steel.
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.
