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The interaction mechanism of screw dislocations with coherent twin boundaries in different face-centred cubic metals

Jin, Z. H. and Gumbsch, P. and Ma, E. and Albe, K. and Lu, K. and Hahn, H. and Gleiter, H. (2006):
The interaction mechanism of screw dislocations with coherent twin boundaries in different face-centred cubic metals.
In: Scripta Materialia, Elsevier Science Publishing Company, pp. 1163-1168, 54, (6), [Online-Edition: http://www.sciencedirect.com/science/article/pii/S1359646205...],
[Article]

Abstract

The interaction between screw dislocations and coherent twin boundaries has been studied by means of molecular dynamics simulations for Al, Cu and Ni. Depending oil the material and the applied strain, a screw dislocation approaching the coherent twin boundary from one side may either propagate into the adjacent twin grain by cutting through the boundary or it may dissociate within the boundary plane. Which one of these two interaction modes applies seems to depend oil the material dependent energy barrier for the nucleation of Shockley partial dislocations. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type: Article
Erschienen: 2006
Creators: Jin, Z. H. and Gumbsch, P. and Ma, E. and Albe, K. and Lu, K. and Hahn, H. and Gleiter, H.
Title: The interaction mechanism of screw dislocations with coherent twin boundaries in different face-centred cubic metals
Language: English
Abstract:

The interaction between screw dislocations and coherent twin boundaries has been studied by means of molecular dynamics simulations for Al, Cu and Ni. Depending oil the material and the applied strain, a screw dislocation approaching the coherent twin boundary from one side may either propagate into the adjacent twin grain by cutting through the boundary or it may dissociate within the boundary plane. Which one of these two interaction modes applies seems to depend oil the material dependent energy barrier for the nucleation of Shockley partial dislocations. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Journal or Publication Title: Scripta Materialia
Volume: 54
Number: 6
Publisher: Elsevier Science Publishing Company
Uncontrolled Keywords: Dislocation, Grain boundary, Twin, Simulation
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 28 Feb 2012 14:51
Official URL: http://www.sciencedirect.com/science/article/pii/S1359646205...
Identification Number: doi:10.1016/j.scriptamat.2005.11.072
Related URLs:
Funders: This research was supported by the Deutsche Forschungsgemeinschaft (DFG) under Contracts Gu/367-18 and AL 578-1.
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