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Fracture of complex metallic alloys: An atomistic study of model systems

: Rösch, F.; Trebin, H.-R.; Gumbsch, P.


The philosophical magazine 86 (2006), No.6-8, pp.1015-1020
ISSN: 1478-6435
ISSN: 0031-8086
ISSN: 1478-6443
Journal Article
Fraunhofer IWM ()

Molecular dynamics simulations of crack propagation are performed for two extreme cases of complex metallic alloys. In a model quasicrystal the structure is determined by clusters of atoms, whereas the model C15 Laves phase is a simple periodic stacking of a unit cell. The simulations reveal that the basic building units of the structures also govern their fracture behaviour. Atoms in the Laves phase play a comparable role with the clusters in the quasicrystal. Although the latter are not rigid units, they have to be regarded as significant physical entities.