Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Dislocations in materials with mixed covalent and metallic bonding

: Nguyen-Manh, D.; Cawkwell, M.J.; Gröger, R.; Mrovec, M.; Porizek, R.; Pettifor, D.G.; Vitek, V.


Devincre, B.:
Dislocations 2004. An International Conference on the Fundamentals of Plastic Deformation : Held at La Colle-sur-Loup (French Riviera, France), September 13-17, 2004
Amsterdam: Elsevier, 2005 (Materials science & engineering. A, Structural materials: properties, microstructure and processing 400/401.2005)
International Conference on the Fundamentals of Plastic Deformation <2004, La Colle-sur-Loup, France>
Conference Paper, Journal Article
Fraunhofer IWM ()

Environment-dependent bond-order potentials have been developed for L10 TiAl, bcc Mo and fcc Ir. They comprise both the angular character of bonding and the screening effect of nearly free electrons. These potentials have been employed in atomistic studies of screw dislocations that revealed the non-planar character of their cores. It is argued that both covalent as well as metallic character of bonding govern these structures, which in turn control the mechanical behaviour.