Abstract
The paper considers test results for corrosion cracking in unfixed U-shaped samples of steels Cr18Ni10 and Cr18Ni8 in a 1 N HCl solution at a room temperature and in a saturated NH4Cl solution at 100°C. It is found that, in such samples, corrosion cracks occur on both the convex and the concave side. This fact contradicts theoretical concepts according to which residual stresses of opposite signs have to occur in the surface layers on opposite sides of the samples after the bending and subsequent elastic unloading. Examples are presented for the formation of CC microcracks near the growing pittings in smooth flat samples made of steel Cr18Ni10Ti in the absence of external stresses.
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References
Birger, I.A., Ostatochnye napryazheniya (Residual Stresses), Moscow: Mashgiz, 1963.
Turkin, V.S., Deformatsiya metalla trub v uprugoplasticheskoi stadii (The Deformation of the Pipe Metal in the Elastic-Plastic Stage), Moscow: Glavgaz SSSR, 1961.
Mellor, W. and Johnson, P.B., Plasticity for Mechanical Engineers, Princeton, NJ: D. van Nostrand, 1962.
Zubchaninov, V.G., Osnovnye teorii uprugosti i plastichnosti (Fundamental Theories of Elasticity and Plasticity), Moscow: Vysshaya Shkola, 1990.
Pimshtein, N.G. and Kabanova, O.E., Evaluation of residual stresses in the pipe-bends after bending, Khim. Neftegaz. Mashinostr., 2012, no. 6, pp. 13–14.
Korroziya. Spravochnik (Corrosion: Handbook), Moscow: Metallurgiya, 1981.
Logan, H.L., The Stress Corrosion of Metals, New York: Wiley, 1966.
Malyshev, V.N., Corrosion cracking of steel 18Cr10NiTi in single-moment hydrochloric acid at room temperature, initiated by hydriding, Vopr. Metalloved., 2010, no. 1 (61), pp. 117–125.
Fofanov, D. and Pavlov, O.V., Is copper terrible in austenitic steels? Armaturostroenie, 2010, no. 1 (64), p. 62.
Struktura i korroziya metallov i splavov. Atlas-spravochnik (Structure and Corrosion of Metals and Alloys: Handbook), Moscow: Metallurgiya, 1989.
Svoistva neorganicheskikh soedinenii: spravochnik (Properties of Inorganic Compounds: Handbook), Leningrad: Khimiya, 1983.
Fridman, Ya.B., Mekhanicheskie svoistva metallov. Chast’ 1. Deformatsiya i razrushenie (Mechanical Properties of Metals, Part 1: Deformation and Destruction), Moscow: Mashinostroenie, 1974.
ASTM G30–97(2009): Standard Practice for Making and Using U-Bend Stress-Corrosion Test Specimens, West Conshohocken, PA: ASTM Int., 2009.
Rekov, A.M., Kornienko, V.T., and Kornienko, E.O., Distribution of deformations and parameters of stressstrain state in steel Kh18N10T, Met. Sci. Heat Treat., 2013, vol. 55, nos. 7–8, pp. 451–455.
Vdovin, S.A., Teoriya i raschety plastichnykh trub (Theory and Calculations of Flexible Pipes), Moscow: Mashinostroenie, 2009.
Levchenko, V.A., Kuzyukov, A.I., Nikhaenko, Yu.Ya., and Novitskii, V.S., The surface condition, corrosion cracking, and pitting corrosion of steel 08Kh18N10T MgCl2 in solution, Zashch. Met., 1986, no. 1, p. 114.
Morgulova, T.K. and Martynova, O.I., Vodnye rezhimy teplovykh i atomnykh stantsii (Water Regimes of Thermal and Nuclear Power Plants), Moscow: Vysshaya Shkola, 1987.
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Original Russian Text © B.K. Barakhtin, V.N. Malyshev, 2015, published in Voprosy Materialovedeniya, 2015, No. 2(82), pp. 161–166.
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Barakhtin, B.K., Malyshev, V.N. Examples of corrosion cracking in Cr18Ni10Ti steel caused by residual stresses at bends and pittings. Inorg. Mater. Appl. Res. 7, 904–908 (2016). https://doi.org/10.1134/S2075113316060022
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DOI: https://doi.org/10.1134/S2075113316060022