Abstract
High resolution transmission electron microscopy (HRTEM) has been used to observe the core structures of a and a edge dislocations in bicrystals of stoichiometric NiAl. The images indicate that the core of a edge dislocations are compact. Two different core structures have been observed for a edge dislocations. In one configuration, the a dislocation is decomposed into two a dislocations, while in the other it is climb-dissociated into partial dislocations. Both configurations are non-planar on the scale of about 1 nm. EAM calculations have been performed to determine the relative energies and stabilities of these configurations. The implications of these core configurations are briefly discussed with respect to the macroscopic flow behavior of NiAl.
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.
