Estimation of copper activation parameters upon a transition from the exponential to power stress dependence of the creep rate

The results of estimation of activation parameters in the region of exponential (I) and power (II) dependences of the steady-state creep rate of polycrystalline copper on stress were represented. It is shown that the elastic long-range stress produced by dislocations in region I can be determined di...

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Bibliographic Details
Published inTechnical physics Vol. 56; no. 10; pp. 1415 - 1418
Main Authors Petrov, A. I., Razuvaeva, M. V.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.10.2011
Springer
Subjects
Classical and Continuum Physics
Physics
Physics and Astronomy
Solid State
Internal Stress
Creep Rate
Stack Defect Energy
Effective Diffusion Coefficient
Dislocation Density
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Summary:The results of estimation of activation parameters in the region of exponential (I) and power (II) dependences of the steady-state creep rate of polycrystalline copper on stress were represented. It is shown that the elastic long-range stress produced by dislocations in region I can be determined directly from the dependence of the creep rate on the stress. An energy criterion of the transition from creep region I to region II is proposed.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784211100161