Climb dissociation of ?111? superdislocations in ?-CuZn
- 1 April 1985
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 51 (4) , 629-637
- https://doi.org/10.1080/01418618508237583
Abstract
The core structure of 〈111〉 superdislocations in β-CuZn deformed at high temperatures has been studied in detail by weak-beam electron microscopy. It has been found that the two superpartials of the 〈111〉 superdislocations, both in edge and near-screw orientations, do not lie on the same glide plane. That is, the 〈111〉 superdislocations are climb-dissociated. The climb dissociation most likely takes place during glide motion, presumably as a result of interactions with vacancies. The transition of slip direction and the strength anomaly observed at around 200°C in β-CuZn can be explained by this mechanism.Keywords
This publication has 8 references indexed in Scilit:
- The anomalous strength peak and the transition of slip direction in β-CuZnPhilosophical Magazine A, 1985
- Dislocation structures of β-CuZn deformed in compression between 25 and 300°CPhilosophical Magazine A, 1984
- Burgers vector determination of dislocations in an elastically anisotropic crystal by high-order reflection imaging technique in a HVEMPhilosophical Magazine A, 1984
- Anti-phase boundary energy in β-CuZnPhilosophical Magazine A, 1984
- The production and annealing of point defects in β-CuZnActa Metallurgica, 1971
- Prediction of the operative slip system in CsCl type compounds using anisotropic elasticity theoryMaterials Science and Engineering, 1970
- Investigations of dislocation strain fields using weak beamsPhilosophical Magazine, 1969
- Ana〈110〉 +a〈001〉 dislocation pair in beta-brassPhilosophical Magazine, 1969