Structure, properties, and resistance to stress-corrosion cracking of a nitrogen-containing austenitic steel strengthened by thermomechanical treatment
- Authors: Mushnikova S.Y.1, Kostin S.K.1, Sagaradze V.V.2, Kataeva N.V.2
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Affiliations:
- Kurchatov Institute National Research Center – Prometei Central Research Institute of Structural Materials
- Mikheev Institute of Metal Physics, Ural Branch
- Issue: Vol 118, No 11 (2017)
- Pages: 1155-1166
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/167339
- DOI: https://doi.org/10.1134/S0031918X17110096
- ID: 167339
Cite item
Abstract
The results of comparative studies of the structure, mechanical properties, and resistance to stresscorrosion cracking (SCC) in the chloride solutions of a Cr–Mn–Ni austenitic nitrogen-containing steel (20Cr–6Ni–11Mn–1.5Mo–N–V–Nb) produced with the use of different regimes of the high-temperature thermomechanical treatment (HTTMT) have been presented. An unfavorable effect of the grain-boundary precipitates of the nitride phase on the impact toughness and resistance to SCC has been found. It has been shown that the strengthening of nitrogen-containing steel upon HTTMT, which ensures an increase in the yield stress by 1.8 times compared to the austenitized state, does not decrease the resistance to SCC.
About the authors
S. Yu. Mushnikova
Kurchatov Institute National Research Center – Prometei Central Research Institute of Structural Materials
Email: vsagaradze@imp.uran.ru
Russian Federation, St. Petersburg, 191015
S. K. Kostin
Kurchatov Institute National Research Center – Prometei Central Research Institute of Structural Materials
Email: vsagaradze@imp.uran.ru
Russian Federation, St. Petersburg, 191015
V. V. Sagaradze
Mikheev Institute of Metal Physics, Ural Branch
Author for correspondence.
Email: vsagaradze@imp.uran.ru
Russian Federation, Ekaterinburg, 620990
N. V. Kataeva
Mikheev Institute of Metal Physics, Ural Branch
Email: vsagaradze@imp.uran.ru
Russian Federation, Ekaterinburg, 620990