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Plasticity, Dislocation Structures and Antiphase Boundary Energies in Fe3Al Single Crystals with Chromium

Published online by Cambridge University Press:  15 February 2011

Filip Král ,
Peter Schwander  and
Gernot Kostorz
Filip Král
Affiliation:
ETH Zürich, Institut für Angewandte Physik, CH-8093 Zürich, Switzerland.
Peter Schwander
Affiliation:
ETH Zürich, Institut für Angewandte Physik, CH-8093 Zürich, Switzerland.
Gernot Kostorz
Affiliation:
ETH Zürich, Institut für Angewandte Physik, CH-8093 Zürich, Switzerland.
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Abstract

The influence of Cr additions on the positive temperature dependence of the critical resolved shear stress of Fe3Al is investigated. Single crystals of binary Fe-28 at.% Al and ternary Fe-28 at.% Al-6 at.% Cr with different orientations are deformed in uniaxial compression between room temperature and 1273 K. The dislocation arrangement and the dissociation of superdislocations are studied by transmission electron microscopy using the weak-beam technique. The operative slip systems are discussed on the basis of the direct measurements of the antiphase boundary energies and of the activation volume.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 337
Copyright
Copyright © Materials Research Society 1997

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References

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