Abstract
Mixed mode I/II experiments for base material AA2524 indicate that (a) transition from a local opening mode of fracture to a local shear mode of fracture occurs in AA2524 at much lower levels of far-field shear loading than observed in AA2024, showing the increased potential for mode transition in the cleaner aluminum alloy AA2524 and (b) the measured critical crack opening displacement (∣COD crit∣) in AA2524 is isotropic and equal to the maximum measured value (LT orientation) in AA2024. Mixed mode I/II experiments in AA2524 friction stir weld specimens show that (a) changes in microstructure and particularly, reduction in constituent particle volume fraction result in virtual elimination of fracture along constituent particle bands, (b) AA2524 has an increased tendency to transition from local mode I to local mode II crack growth during stable tearing and (c) specific features observed during the fracture process (e.g. mode transition) are shown to be directly correlated to both metallurgical differences in the FSW microstructure and local variations in the measured COD crit.
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.
