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Interaction of Slip Bands with Grain Boundary - in situ TEM Observation

Published online by Cambridge University Press:  21 March 2011

Juliana Gemperlová ,
Alain Jacques ,
Antonín Gemperle  and
Niva Zárubová
Juliana Gemperlová
Affiliation:
Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic
Alain Jacques
Affiliation:
Laboratoire de Physique des Matériaux, Ecole des Mines, parc de Saurupt, 54042 Nancy Cedex, France
Antonín Gemperle
Affiliation:
Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic
Niva Zárubová
Affiliation:
Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic
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Abstract

Mechanism of the slip transmission across the grain boundaries was studied on Σ3 bicrystals of Fe-4at%Si by transmission electron microscopy. In situ straining experiments as well as post mortem observations were performed. Three distinct events were observed in dependence on the angle α between the slip and grain boundary planes, namely transformation of the tertiary slip system in one grain into the secondary slip system in the other grain for α ≍ 90°, cross slip of dislocations of the primary slip system into the {112} plane parallel to the grain boundary for α ≍21°, and an abrupt formation of a sub-grain boundary in one grain for α ≍49°. Reasons for these diverse phenomena will be discussed in terms of interactions between the slip dislocations and the grain boundary dislocations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 652: Symposium Y – Influences of Interface & Dislocation Behavior on Microstructure Evolution , 2000 , Y8.23
Copyright
Copyright © Materials Research Society 2001

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References

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