Effect of the deformation temperature on the structural refinement of BCC metals with a high stacking fault energy during high pressure torsion
- Authors: Voronova L.M.1, Chashchukhina T.I.1, Gapontseva T.M.1, Krasnoperova Y.G.1, Degtyarev M.V.1, Pilyugin V.P.1
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Affiliations:
- Institute of Metal Physics, Ural Branch
- Issue: Vol 2016, No 10 (2016)
- Pages: 960-965
- Section: Structure and Properties of the Deformed State
- URL: https://journals.rcsi.science/0036-0295/article/view/170943
- DOI: https://doi.org/10.1134/S0036029516100232
- ID: 170943
Cite item
Abstract
The structural evolution in bcc metals (molybdenum, niobium) with a high stacking fault energy (300 and 200 mJ/m–2, respectively) is studied during high pressure torsion in Bridgman anvils at temperatures of 290 and 80 K. It is established that cryogenic deformation of these metals does not result in twinning; however, banded structures are formed at the initial stage of deformation. Misoriented kink bands, which inhibit the formation of a homogeneous submicrocrystalline structure similarly to twins, form in molybdenum. The banded structures in niobium are characterized by low-angle misorientations; they do not suppress the formation of a submicrocrystalline structure and the refinement of microcrystallites to nanosizes.
About the authors
L. M. Voronova
Institute of Metal Physics, Ural Branch
Author for correspondence.
Email: highpress@imp.uran.ru
Russian Federation, Yekaterinburg, 620137
T. I. Chashchukhina
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Russian Federation, Yekaterinburg, 620137
T. M. Gapontseva
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Russian Federation, Yekaterinburg, 620137
Yu. G. Krasnoperova
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Russian Federation, Yekaterinburg, 620137
M. V. Degtyarev
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Russian Federation, Yekaterinburg, 620137
V. P. Pilyugin
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Russian Federation, Yekaterinburg, 620137