Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9796083 | Materials Science and Engineering: A | 2005 | 4 Pages |
Abstract
Metadislocations are novel structural defects firstly observed in the complex metallic alloy ξâ²-Al-Pd-Mn. We present a transmission electron microscopy study on metadislocation reactions and networks. It is shown that metadislocations can dissociate into partials, which leads to a decrease of the elastic line energy. Connected groups of metadislocations can assume large and complex network structures with large total Burgers vectors. However, the local elastic strain at the individual metadislocation cores as well as the fault-plane energies remain small. By this mechanism, effective large Burgers vectors, contributing massively to plastic strain, can be distributed over a large portion of the material.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Marc Heggen, Michael Feuerbacher,