Observation of Superlattice Dislocations on Cube Planes in Ni3Al
- 1 August 1973
- journal article
- Published by Cambridge University Press (CUP) in Proceedings, annual meeting, Electron Microscopy Society of America
- Vol. 31, 174-175
- https://doi.org/10.1017/s0424820100071314
Abstract
The energy of an a/2 shear antiphase. boundary in the Ll2 expected to be at a minimum on {100} cube planes because here strue ture is there is no violation of nearest-neighbor order. The latter however does involve the disruption of second nearest neighbors. It has been suggested that cross slip of paired a/2 dislocations from octahedral onto cube planes is an important dislocation trapping mechanism in Ni3Al; furthermore, slip traces consistent with cube slip are observed above 920°K.Due to the high energy of the {111} antiphase boundary (> 200 mJ/m2), paired a/2 dislocations are tightly constricted on the octahedral plane and cannot be individually resolved.This publication has 1 reference indexed in Scilit:
- Investigations of dislocation strain fields using weak beamsPhilosophical Magazine, 1969