Abstract
The experimental results of I indicate that the dislocation velocity is limited by a thermally activated process, and the parameters of the appropriate rate equation are evaluated. At very low temperatures, the stress derivative of the free energy of activation (the 'activation volume’) is only a few atomic volumes. It is very difficult to explain the magnitude of the low-temperature stress or that of the activation volume if direct dislocation—impurity interactions are responsible for most of the resistance to motion, and it is concluded that there is probably a significant lattice interaction (a ‘Peierls-Nabarro force’). The results are compared with the predictions of recent models for the overcoming of the Peierls barrier by the production of double kinks in straight dislocation lines.
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 callMore From: Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
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.
