Structure, properties, and resistance to stress-corrosion cracking of a nitrogen-containing austenitic steel strengthened by thermomechanical treatment


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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.

Sobre autores

S. Mushnikova

Kurchatov Institute National Research Center – Prometei Central Research Institute of Structural Materials

Email: vsagaradze@imp.uran.ru
Rússia, St. Petersburg, 191015

S. Kostin

Kurchatov Institute National Research Center – Prometei Central Research Institute of Structural Materials

Email: vsagaradze@imp.uran.ru
Rússia, St. Petersburg, 191015

V. Sagaradze

Mikheev Institute of Metal Physics, Ural Branch

Autor responsável pela correspondência
Email: vsagaradze@imp.uran.ru
Rússia, Ekaterinburg, 620990

N. Kataeva

Mikheev Institute of Metal Physics, Ural Branch

Email: vsagaradze@imp.uran.ru
Rússia, Ekaterinburg, 620990

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