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Parameters of Dislocation Structure and Work Hardening of Ni3Ge

Published online by Cambridge University Press:  26 February 2011

N. A. Koneva ,
Yu.V. Solov'eva ,
V. A. Starenchenko  and
E. V. Kozlov
N. A. Koneva
Affiliation:
Tomsk State University of Architecture and Building, Department of Physics, Solyanaya sq. 2, Tomsk 634003, Russia
Yu.V. Solov'eva
Affiliation:
Tomsk State University of Architecture and Building, Department of Physics, Solyanaya sq. 2, Tomsk 634003, Russia
V. A. Starenchenko
Affiliation:
Tomsk State University of Architecture and Building, Department of Physics, Solyanaya sq. 2, Tomsk 634003, Russia
E. V. Kozlov
Affiliation:
Tomsk State University of Architecture and Building, Department of Physics, Solyanaya sq. 2, Tomsk 634003, Russia
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Abstract

Orientation dependence of the yield stress temperature anomaly in Ni3Ge single crystals with the L12 structure was investigated during compression tests. The measurements were carried out in the 4.2 K-1000 K temperature interval for two orientations of single crystals, [001] and [234]. The dislocation structure was studied by TEM. Quantitative measurements of different parameters of dislocation structure were carried out. The values of the scalar dislocation density, ρ, were determined for different temperatures in the deformation interval from the yield stress up to fracture. Temperature dependence of the friction stress τF (T) and the interdislocation interaction parameter α(T) were also obtained. The change in the fraction of straight dislocations as a function of temperature was analyzed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 842: Symposium S – Integrative and Interdisciplinary Aspects of Intermetallics , 2004 , S5.25
Copyright
Copyright © Materials Research Society 2005

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References

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