Effect of the γ → α mtensite tnsformation in Fe-Cr-N aloys on teir sress-crrosion cacking / Bannykh O.A., Blinov V.M., Berezovskaya V.V., Kostina M.V., Gervas'ev M.A., Golyakov I.V., Trushin I.S. // Russian Metallurgy (Metally). - 2005. - V. 2005, l. 4. - P. 310-314.

ISSN:

00360295

Type:

Article

Abstract:

New high-nitrogen austenitic 0Kh21A1 and 0Kh18N2A1 alloys are subjected to stress-corrosion cracking (SCC) tests in a 20% NaCl solution. The alloys are studied by fractography, dilatometry, and X-ray diffraction before and after the SCC tests (their fracture surfaces are studied). The nickel-free alloy is found to have higher strength and SCC resistance. Both alloys exhibit the minimum SCC resistance after aging at 350°C. Our studies have shown that the chemical inhomogeneity of the initial austenite in the 0Kh21A1 and 0Kh18N2A1 alloys is the main cause of the formation of martensite of different compositions and morphology during both cooling and deformation. The SCC of the alloys under study is thought to be controlled by the γ → α martensite transformation of a nitrogen-rich austenite during deformation. Copyright © 2005 by Pleiades Publishing, Inc.

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-33748509355&partnerID=40&md5=74702d503636ace0a7afb0ae9517310c
Affiliations	Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 117334, Russian Federation; Ural State Technical University, UPI, Ekaterinburg, Russian Federation
References	Kostina, M.V., Bannykh, O.A., Blinov, V.M., Specific features of steels alloyed by nitrogen (2000) Metalloved. Term. Obrab. Met., 12, pp. 3-6; Kostina, M.V., Bannykh, O.A., Blinov, V.M., Chromium corrosion-resistant steels alloyed by nitrogen - A new class of structural steels (2000) Tekhnologiya Metallov, 10, pp. 2-12; Ustinovshchikov, Yu.I., Rats, A.V., Bannykh, O.A., Structure and properties of high-nitrogen austenitic Fe-18% Cr alloys containing up to 2% Ni (1998) Izv. Ross. Akad. Nauk, Ser. Met., 2, pp. 38-43; Kostina, M.V., Bannykh, O.A., Blinov, V.M., Effects of chemical composition and heat treatment on the corrosion properties of high-nitrogen iron-based alloys containing 15-24% Cr (2001) Izv. Ross. Akad. Nauk, Ser. Met., 3, pp. 26-34; (2001) Russian Metallurgy (Metally), 3, pp. 243-250; (1979) Testing Materials: Handbook, , Metallurgiya, Moscow, in Russia; Brown, W., Srawley, J., (1967) Plane Strain Crack Toughness Testing of High Strength Metallic Materials, , Saunders, Philadelphia, Mir, Moscow; Bannykh, O.A., Blinov, V.M., Kostina, M.V., On the relation between the wear resistance, phase composition, and mechanical properties of new high-nitrogen iron-chromium alloys (2000) Izv. Ross. Akad. Nauk, Ser. Met., 2, pp. 57-64
Correspondence Address	Bannykh, O.A.; Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 117334, Russian Federation; email: bannykh@ultra.imet.ac.ru
Language of Original Document	English
Abbreviated Source Title	Russ. Metall. (Metally)
Source	Scopus