Emission Mössbauer spectroscopy of grain boundaries in ultrafine-grained W and Mo produced by severe plastic deformation
- Authors: Popov V.V.1, Sergeev A.V.1, Stolbovsky A.V.1
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch
- Issue: Vol 118, No 4 (2017)
- Pages: 354-361
- Section: Structure, Phase Transformations, and Diffusion
- URL: https://journals.rcsi.science/0031-918X/article/view/167008
- DOI: https://doi.org/10.1134/S0031918X17040081
- ID: 167008
Cite item
Abstract
Grain boundaries in ultrafine-grained W and Mo produced by severe plastic deformation (SPD) by high-pressure torsion method have been studied by emission Mössbauer spectroscopy on 57Co (57Fe) nuclei. The evolution of the state of the grain boundaries has been studied upon heating. It has been shown that, after SPD, the grain boundaries are in a nonequilibrium state, which is characterized by an excess free volume. Upon annealing, the state of the grain boundaries changes as it approaches the state typical of coarse-grained materials.
About the authors
V. V. Popov
Mikheev Institute of Metal Physics, Ural Branch
Author for correspondence.
Email: vpopov@imp.uran.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990
A. V. Sergeev
Mikheev Institute of Metal Physics, Ural Branch
Email: vpopov@imp.uran.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990
A. V. Stolbovsky
Mikheev Institute of Metal Physics, Ural Branch
Email: vpopov@imp.uran.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990