Abstract
The effects of specimen thickness on fatigue crack growth rate (FCGR) and acoustic emission (AE) behaviors of Q345 steel were investigated. The four-point bending fatigue tests were carried out with AE monitoring simultaneously. Based on the thickness effect analysis, fatigue behavior studies, and AE investigations, the effects of specimen thickness on AE signal and AE source mechanisms during fatigue crack propagation were proposed. The results show that as specimen thickness increased, the FCGR was accelerated slightly, while the AE count rate was increased significantly, suggesting that AE signal was more sensitive to the changes in thickness. By analyzing the AE signals at the new plastic yielding area and the crack tip micro-fracture process, AE source mechanisms were explained. These results suggest that the effects of thickness must be considered to obtain a more accurate estimation of fatigue crack propagation through AE technique.
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.
