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Influence of solutes on the competition between mesoscopic grain boundary sliding and coupled grain boundary motion

Schäfer, Jonathan and Albe, Karsten (2012):
Influence of solutes on the competition between mesoscopic grain boundary sliding and coupled grain boundary motion.
In: Scripta Materialia, Elsevier Science Publishing Company, pp. 315-317, 66, (5), [Online-Edition: http://dx.doi.org/10.1016/j.scriptamat.2011.11.031],
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Abstract

The competition between coupled grain boundary motion and mesoscopic grain boundary sliding as deformation mechanisms in polycrystalline metals is studied for nanocrystalline Cu with and without solutes by molecular dynamics computer simulations. It is shown that coupled grain boundary motion contributes to plastic deformation, and it is found that it leads to the suppression of mesoscopic grain boundary sliding. Segregating solutes, however, effectively pin the grain boundaries in place and allow for grain boundary sliding on a mesoscopic scale.

Item Type: Article
Erschienen: 2012
Creators: Schäfer, Jonathan and Albe, Karsten
Title: Influence of solutes on the competition between mesoscopic grain boundary sliding and coupled grain boundary motion
Language: English
Abstract:

The competition between coupled grain boundary motion and mesoscopic grain boundary sliding as deformation mechanisms in polycrystalline metals is studied for nanocrystalline Cu with and without solutes by molecular dynamics computer simulations. It is shown that coupled grain boundary motion contributes to plastic deformation, and it is found that it leads to the suppression of mesoscopic grain boundary sliding. Segregating solutes, however, effectively pin the grain boundaries in place and allow for grain boundary sliding on a mesoscopic scale.

Journal or Publication Title: Scripta Materialia
Volume: 66
Number: 5
Publisher: Elsevier Science Publishing Company
Uncontrolled Keywords: Nanocrystalline materials, Grain boundary segregation, Plastic deformation, Molecular dynamics
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 31 Aug 2012 09:57
Official URL: http://dx.doi.org/10.1016/j.scriptamat.2011.11.031
Identification Number: doi:10.1016/j.scriptamat.2011.11.031
Related URLs:
Funders: DFG Al578-7, The authors acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG) through Forschergruppe 714., Computing time was made available by HHLR Frankfurt and Darmstadt, as well as by CSC Jülich.
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