Features of the low-temperature creep of a Nb–Ti alloy after large plastic deformations at 77 K

The low-temperature (77 K) creep and the corresponding changes in the resistivity of a niobium–titanium alloy subjected to plastic deformation by drawing at 77 K are investigated. It is shown that after large plastic deformations (ε>99%) one observes anomalies of the low-temperature creep which d...

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Bibliographic Details
Published in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2004-04, Vol.30 (4), p.340-343
Main Authors: Aksenov, V. K., Volchok, O. I., Karaseva, E. V., Starodubov, Ya. D.
Format: Article
Language:English
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Summary:The low-temperature (77 K) creep and the corresponding changes in the resistivity of a niobium–titanium alloy subjected to plastic deformation by drawing at 77 K are investigated. It is shown that after large plastic deformations (ε>99%) one observes anomalies of the low-temperature creep which do not appear in tests of samples subjected to low and medium deformations. The creep rate in the transient stage is significantly higher than would follow from the classical ideas about the mechanisms of low-temperature creep (logarithmic law), and the time dependence of the creep deformations is described by a power law, which corresponds to recovery creep. In the creep process oscillations appear on the resistivity curves; these are especially pronounced after drawing in liquid nitrogen. Possible causes of the observed effects are discussed.
ISSN:1063-777X
1090-6517
DOI:10.1063/1.1705444