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Low-temperature deformation of nanocrystalline niobium (2000)

Shpeizman, V. V. ; Nikolaev, V. I. ; Smirnov, B. I. ; [et al.]

Springer

Physics of the solid state 42 (2000), S. 1066-1069

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ISSN: 1063-7834

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The strain characteristics of nanocrystalline niobium are measured in the temperature range 4.2–300 K. It is shown that the development of a strong local deformation with clearly delineated macroscopic slip bands occurs at 4.2 K and 10 K. The thermal effects at a stress jump observed upon transition of the sample (or a niobium strip placed close to the sample) from the superconducting state to the normal state are estimated. It is demonstrated that the temperature dependence of the yield point σs(T) can be divided into three portions: two portions (T〈10 K and T〉70 K) with a slight change in σs and the third portion with a strong dependence σs(T). The strain characteristics of polycrystals with nano-and larger-sized grains are compared with those of single crystals.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1134/1.1131349

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