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Mechanical Properties of Binary Ni3Al Single Crystals

Published online by Cambridge University Press:  15 February 2011

J. Bonneville ,
J.-L. Martin ,
P. Spätig ,
B. Viguier  and
B. Matterstock
J. Bonneville
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne (Switzerland), bonneville@eldpb.epfl.ch
J.-L. Martin
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne (Switzerland), bonneville@eldpb.epfl.ch
P. Spätig
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne (Switzerland), bonneville@eldpb.epfl.ch
B. Viguier
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne (Switzerland), bonneville@eldpb.epfl.ch
B. Matterstock
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, Département de Physique, 1015 Lausanne (Switzerland), bonneville@eldpb.epfl.ch
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Abstract

The mechanical properties of binary Ni76.6Al23.4 single crystalline specimens have been studied in compression test over a wide range of temperature (293–1100K). The resolved proof stress (τ0.2%) and the corresponding work-hardening rate (θ0.2%) have been measured as a function of temperature. In addition, a technique of repeated stress relaxations has been used to investigate the related microscopic activation volume (V0.2%) and to characterize the variation in the density of mobile dislocations that occurs during such transient tests. It is observed that not only τ0.2% exhibits an anomalous behavior with temperature but also θ0.2%, while the stress dependence of V0.2% may be considered as normal, i.e. V0.2% is a monotonie decreasing function of stress.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 419
Copyright
Copyright © Materials Research Society 1997

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References

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