Abstract
An experimental study was performed on polycrystalline copper at different plastic strain amplitudes in air and vacuum to quantitatively assess the link between the microstructure evolution and the mechanical behaviour. Fatigue life extension due to vacuum environment allowed the observation of a second hardening stage at low plastic amplitude. This finding, in contrast to the stabilisation regime observed in air made it possible to state that the dislocation structure continues to evolve beyond the failure in air. In addition, the dislocation microstructure was found to evolve in a sequence of veins, walls-channels and elongated cells to attain an equiaxed cell arrangement with continued fatigue cycling. Moreover, the quasi-stabilised regime took place with different dislocation structures according to the plastic strain level.
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.
