Abstract
The effect of temperature (in the range 20–500°C) on the Young’s modulus of nanostructured niobium with Ta impurity content <0.5 wt % and that of O2 < 0.1 wt % and with a mean grain size of ≅200 nm is studied. The transformation of polycrystalline niobium into a nanostructured state is performed through severe plastic deformation by equal-channel angular pressing. The Young’s modulus is found to increase in two stages as the temperature of isothermal annealing is gradually increased. The mechanisms of recovery of the elastic modulus upon annealing of the nanostructured niobium are discussed in the context of the modern concepts of the defect structure of deformed metals.
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Translated from Fizika Tverdogo Tela, Vol. 45, No. 11, 2003, pp. 2017–2021.
Original Russian Text Copyright © 2003 by Burenkov, Nikanorov, Smirnov, Kopylov.
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Burenkov, Y.A., Nikanorov, S.P., Smirnov, B.I. et al. Recovery of Young’s modulus upon annealing of nanostructured niobium produced through severe plastic deformation. Phys. Solid State 45, 2119–2123 (2003). https://doi.org/10.1134/1.1626747
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DOI: https://doi.org/10.1134/1.1626747