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A Weak-Beam Study of the Microstructure of β-CUZN Deformed in the Domain of Flow Stress Anomaly

Published online by Cambridge University Press:  26 February 2011

G. Dirras ,
P. Beauchamp  and
P. Veyssière
G. Dirras
Affiliation:
Laboratoire de Métallurgie Physique, 40 Avenue du Recteur Pineau, 86022- Poitiers Cedex -France.
P. Beauchamp
Affiliation:
Laboratoire de Métallurgie Physique, 40 Avenue du Recteur Pineau, 86022- Poitiers Cedex -France.
P. Veyssière
Affiliation:
LEM, CNRS-ONERA, BP 72,92322 Châtillon Cedex, France
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Abstract

β-brass single crystals oriented along <001> were deformed between room temperature and 300°C. The deformation microstructure and dissociation properties were studied by transmission electron microscopy under weak-beam imaging conditions.

Whatever the deformation temperature, superdislocations with <111> Burgers vector and strong edge component dominate within the microstructure. In addition, below the temperature of the flow stress peak (≈ 250°C), the density of screw relative to mixed superdislocations decreases as straining temperature increases. Dissociation does not always occur on the slip plane neither does it proceed exclusively by glide, even in samples deformed at 100°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 737
Copyright
Copyright © Materials Research Society 1989

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References

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