Title of article
Dislocation activity and nano-void formation near crack tips in nanocrystalline Ni
Author/Authors
Farkas، D. نويسنده , , Petegem، S. Van نويسنده , , Derlet، P.M. نويسنده , , Swygenhoven، H. Van نويسنده ,
Pages
-3114
From page
3115
To page
0
Abstract
Molecular statics is used to study the crack propagation in model nanocrystalline Ni with a mean grain size of 10 nm. It is shown that the crack propagates intergranularly, creating nano-voids ahead of the crack which coalesce gradually. Plasticity in the neighborhood of the crack tip is observed to be mediated by dislocation activity. The sequential emission of partials results in the observation of full dislocations and twinning.
Keywords
fracture , simulation , Nanocrystalline metals
Journal title
Astroparticle Physics
Record number
117521
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