Conclusions
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1.
The strength and plasticity of samples of 40 steel decrease after a 240-h hold in technical grade hydrogen with a pressure of 20 MPa and depend little upon the degree of preliminary work hardening. Failure of the samples occurs both in the boundaries and in the body of the grains.
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2.
The curve of the relative increase in sample diameter has a weakly expressed maximum at a degree of deformation of 5%.
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3.
An increase in the oxygen content in comparison with the original occurs only in the preliminarily work hardened samples, and the greater the degree of preliminary deformation, the greater it is.
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Literature cited
R. E. Allen, Am. Petroleum Inst.,41, No. 3, 74–85 (1961).
P. D. Khinskii and V. P. Krylov, “The influence of hydrogen on the properties of large forgings,” in: Proceedings of the Central Scientific-Research, Design, and Construction Institute for Boilers and Turbines [in Russian], No. 105 (1971), pp. 89–101.
I. G. Smagina, The Influence of Hydrogen on the Service Properties of Steel [in Russian], Knizh. Izd-vo, Irkutsk (1963), pp. 47–59.
V. P. Krylov and M. S. Anisimova, “The oxidation of metals in technical grade hydrogen at a temperature of 260–500°C with an increased pressure,” Zashch. Met., No. 2, 168 (1980).
Additional information
Scientific and Production Union of the I. I. Polzunov Central Scientific-Research, Design, and Construction Institute for Boilers and Turbines. S. M. Kirov Leningrad Institute for Textile and Light Industry. A. A. Zhdanov Izhorsk Plant Production Union. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 7–8, February, 1984.
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Krylov, V.P., Panov, V.I. & Sochivko, A.B. Hydrogen corrosion of work-hardened 40 steel. Met Sci Heat Treat 26, 96–98 (1984). https://doi.org/10.1007/BF00707153
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DOI: https://doi.org/10.1007/BF00707153