Abstract
Abstract A high density of helical dislocations has been observed in zone-refined aluminium. The specific conditions of quenching and deformation required to produce this result indicate that helices are not normally seen in pure metals, partly because of the presence of effective competing sinks and partly because of the annihilation of screw dislocations by cross-slip during plastic deformation. The helices are not circular helices but are approximately the geodesics on a right prism. The base of the prism is a rhombus, the generator is the Burgers vector b and the feces are the (111) planes containing b. This result is explained as an effect of dislocation core energy, the core energy being lowest if the dislocation lies in a {111} plane containing b, i.e. a glide plane.
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.
