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Dislocation Boundaries and Slip Systems in Uniaxially Deformed Crystals

Published online by Cambridge University Press:  14 March 2011

Grethe Winther ,
Xiaoxu Huang ,
Søren Fæster Nielsen  and
John Wert
Grethe Winther
Affiliation:
Materials Research Department, Risø National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark
Xiaoxu Huang
Affiliation:
Materials Research Department, Risø National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark
Søren Fæster Nielsen
Affiliation:
Materials Research Department, Risø National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark
John Wert
Affiliation:
Materials Research Department, Risø National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark
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Abstract

The dislocations in the extended planar dislocation boundaries formed during deformation are generated by the active slip systems. Investigation of the boundaries is therefore a tool to obtain information on the active slip systems. Here, the orientation of the dislocation boundaries in uniaxially deformed aluminum poly- and single crystals are compared. It is found that the single crystal boundary planes are consistent with those found in polycrystals, indicating that the active slip systems in single and polycrystals are the same. However, boundaries are closer to the slip planes in the single crystals. This is taken as an indication that the secondary slip systems are more active in the polycrystal. The orientation of the boundary plane varies with the crystal orientation in a way that is consistent with activation of the five most stressed slip systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 683: Symposium BB – Materials Instabilities and Patterning in Metals , 2001 , BB1.8.1
Copyright
Copyright © Materials Research Society 2001

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References

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