Abstract

The paper reviews in-situ straining experiments in the high voltage electron microscope on precipitation-hardened MgO, Al-Zn-Mg, Al-Ag, and Al-Li. Dislocations under stress bow out between the precipitates. The distances between the obstacles along the dislocation lines and the curvatures of the bowed-out segments are measured from the electron micrographs. The density of obstacles in the slip plane and the effective stress are calculated from the data. The density agrees or disagrees with the results of other investigations, mainly conventional TEM of the precipitates. From plots of the reciprocal dislocation curvature versus the logarithm of the segment length it is concluded that the dislocations are far more flexible than expected from theory in all materials investigated

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 call

Disclaimer: 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.