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Physics of Metals and Metallography
Erschienen in: Physics of Metals and Metallography 8/2018

01.08.2018 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

Structure of the Surface Layers of Metastable Austenitic Stainless Steel Nitrided in Electron Beam Plasma

verfasst von: V. A. Shabashov, N. V. Gavrilov, K. A. Kozlov, A. V. Makarov, S. G. Titova, V. I. Voronin

Erschienen in: Physics of Metals and Metallography | Ausgabe 8/2018

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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.
Vorheriger Artikel Effect of Magnetic state of Austenite on Martensitic transformation in Fe–Ni Alloys in High and Zero Magnetic Fields
Nächster Artikel Shape Memory Effect in Corrosion-Resistant Steels Hardened by Various Carbides

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Metadaten
Titel
Structure of the Surface Layers of Metastable Austenitic Stainless Steel Nitrided in Electron Beam Plasma
verfasst von
V. A. Shabashov
N. V. Gavrilov
K. A. Kozlov
A. V. Makarov
S. G. Titova
V. I. Voronin
Publikationsdatum
01.08.2018
Verlag
Pleiades Publishing
Erschienen in
Physics of Metals and Metallography / Ausgabe 8/2018
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X18080124

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