Icosahedral order, disclinations, dislocations and plastic deformation in metallic glasses
- 1 May 1989
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 59 (5) , 523-534
- https://doi.org/10.1080/13642818908211174
Abstract
Within the framework of concepts developed for metallic glasses as media with icosahedral coordination order containing a great number of line topological disclinations, their plastic properties are considered. It is demonstrated that moving disclination dipoles, each being equivalent to a dislocation with a variable Burgers vector, can carry plastic deformation in metallic glasses. The transition from a homogeneous mode of plastic deformation to an inhomogeneous one is explained by replacement of a thermally activated character of motion (or generation) of disclination dipoles by an athermal character of motion.Keywords
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