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

Jin, Z. H. ; Gumbsch, P. ; Ma, E. ; Albe, K. ; Lu, K. ; Hahn, H. ; Gleiter, H. (2006)
The interaction mechanism of screw dislocations with coherent twin boundaries in different face-centred cubic metals.
In: Scripta Materialia, 54 (6)
doi: 10.1016/j.scriptamat.2005.11.072
Article, Bibliographie

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. ; Gumbsch, P. ; Ma, E. ; Albe, K. ; Lu, K. ; Hahn, H. ; Gleiter, H.
Type of entry: Bibliographie
Title: The interaction mechanism of screw dislocations with coherent twin boundaries in different face-centred cubic metals
Language: English
Date: March 2006
Publisher: Elsevier Science Publishing Company
Journal or Publication Title: Scripta Materialia
Volume of the journal: 54
Issue Number: 6
DOI: 10.1016/j.scriptamat.2005.11.072
URL / URN: http://www.sciencedirect.com/science/article/pii/S1359646205...
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.

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
Last Modified: 05 Mar 2013 09:59
PPN:
Funders: This research was supported by the Deutsche Forschungsgemeinschaft (DFG) under Contracts Gu/367-18 and AL 578-1.
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