Structure of the Surface Layers of Metastable Austenitic Stainless Steel Nitrided in Electron Beam Plasma
- Authors: Shabashov V.A.1, Gavrilov N.V.2, Kozlov K.A.1, Makarov A.V.1,3,4, Titova S.G.4,5, Voronin V.I.1
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
- Institute of Machine Science, Ural Branch, Russian Academy of Sciences
- Yeltsin Ural Federal University
- Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
- Issue: Vol 119, No 8 (2018)
- Pages: 755-763
- Section: Structure, Phase Transformations, and Diffusion
- URL: https://journals.rcsi.science/0031-918X/article/view/167736
- DOI: https://doi.org/10.1134/S0031918X18080124
- ID: 167736
Cite item
Abstract
The effect of the nitriding temperature in electron beam plasma on the structural and phase composition of the surface layers of metastable austenitic stainless steels is studied. Conversion electron Mössbauer spectroscopy shows that nitriding at 350°C results in the transition of the austenite into the α (bcc) phase by the shear mechanism in the surface layers of a plate (tenths of a micron). A nitrogen supersaturated austenite and a mixture of nitrides with a predominant configuration of three nitrogen atoms in the environment of iron are formed in layers 1–5 μm thick. Nitriding at a temperature of 500°C and above leads to nitrogen supersaturated austenite decomposition, the escape of chromium and nitrogen from the matrix into nitrides CrN, Fe4N, and FexN, and the subsequent γ → α phase transformation.
About the authors
V. A. Shabashov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: shabashov@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
N. V. Gavrilov
Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
Email: shabashov@imp.uran.ru
Russian Federation, Ekaterinburg, 620016
K. A. Kozlov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: shabashov@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
A. V. Makarov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Institute of Machine Science, Ural Branch, Russian Academy of Sciences; Yeltsin Ural Federal University
Email: shabashov@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Ekaterinburg, 620049; Ekaterinburg, 620002
S. G. Titova
Yeltsin Ural Federal University; Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
Email: shabashov@imp.uran.ru
Russian Federation, Ekaterinburg, 620002; Ekaterinburg, 620016
V. I. Voronin
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: shabashov@imp.uran.ru
Russian Federation, Ekaterinburg, 620108