This article presents estimates of damage and lifetime of welded 09G2S structures upon operation under severe conditions of the Arctic and subarctic regions. Accumulation of damage in steel subjected to low temperature ductile–brittle transition has been estimated by measurement of impact toughness in samples with V notch in the corresponding temperature range. On the basis of experimental data, it has been established that the decrease in temperature leads to significant loss of plasticity in the heat-affected zone, where stresses are localized and accelerated growth of cracks and microdefects takes place. As a consequence, the lifetime of steel structure decreases. On the basis of the Kachanov–Rabotnov theory of damage accumulation, a procedure has been proposed for estimating the integral damage of steel of a welded structure subjected to ductile–brittle transition depending on lifetime under certain climatic conditions. Comparison of estimates of accumulated damage in material of structures operating under extreme conditions of Yakutia and under moderate conditions of Krasnoyarsk krai (Russia) makes it possible to conclude that the mean time between failures is determined by climatic conditions. The developed procedure for estimating damage accumulation in the temperature range of ductile–brittle transition would make it possible to decrease the scope of required tests without loss of data reliability. In addition, on its basis, it is possible to diagnose all dangerous industrial objects with restricted access.
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Bol’shakov, A.M. and Ivanov, A.R., Low-cycle research of structural steel smooth samples as an imitation of damage accumulation, Materialy XIV Mezhdunarodnoi nauchno-tekhnicheskoi konferentsii “Problemy resursa i bezopasnosti ekspluotatsii materialov,” g. Sankt-Peterburg, 28–29 oktyabrya 2008 g. (Proc. XIV International Scientific and Technical Conference “Problems of resource and safe use of materials,” St. Petersburg, October 28–29, 2008), St. Petersburg, 2008, pp. 231–232.
Kachanov, L.M., Introduction to Continuum Damage Mechanics, Dordrecht: Springer-Verlag, 1986.
Rabotnov, Yu.M., Vvedenie v mekhaniku razrusheniya (Introduction to Fracture Mechanics), Moscow: Nauka, 1987.
Girenko, V.S. and Kotenkov, E.V., Dependences between the impact toughness and fracture mechanics criteria for structural steels and weld joints, Avtom. Svarka, 1985, no. 9, pp. 13–20.
Grigoriev, A.V. and Lepov, V.V., Lifetime estimation of railroad equipment operated in the extreme northern conditions, Zavod. Lab., Diagn. Mater., 2015, vol. 81, no. 12, pp. 42–48.
Novozhilov, V.V., Plastic loosening, Prikl. Matem. Inf., 1965, vol. 29, no. 4, pp. 681–689.
Plastichnost’ i razrushenie (Plasticity and Fracture), Kolmogorov, V.L., Ed., Moscow: Metallurgiya, 1977.
Soprotivlenie materialov deformirovaniyu i razrusheniyu: Spravochnoe posobie (Material Stress-Strain Resistance: Handbook), Troshchenko, V., Ed., Kiev: Naukova Dumka, 1994, part 2.
Arkhangel’skaya, E.A., Lepov, V.V., and Larionov, V.P., Connected model of delayed fracture of the damaged media, Fiz. Mezomekh., 2001, vol. 4, no. 4, pp. 81–87.
Lepov, V.V., Structural evolution modeling of damage accumulation processes in modern metallic and polymer nanomaterials, World J. Eng., 2012, vol. 10, no. 5, pp. 205–212.
Sannikov, I.I., Kovrova, D.F., and Ustinov, E.P., Study of impact toughness of structural steel and weld joints operated in the Far North conditions, Mezhdunar. Nauch.-Issled. Zh., 2015, no. 6-1 (37), pp. 71–74.
Chernov, V.M., Ermolaev, G.N., and Leont’eva-Smirnova, M.V., Impact toughness of EK-181 ferritic-martensitic chromium (12%) steel under loading by concentrated bending, Tech. Phys., 2010, vol. 55, no. 7, pp. 985–990.
Bol’shakov, A.M., Golikov, N.I., Syromyatnikova, A.S., Alekseev, A.A., Litvintsev, N.M., and Tikhonov, R.P., Failure and damage of oil and gas industry projects after the continuous service, Gaz. Prom., 2007, no. 7, pp. 89–91.
Grigor’ev A.V., Lepov V.V., and Prokop’ev L.A., RF Inventor’s Certificate no. 2018615751, 2018.
The authors declare that they have no conflicts of interest.
Translated by I. Moshkin
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Grigor’ev, A.V., Lepov, V.V. Estimation of Reliability of 09G2S Steel Structures Operating in the North and the Arctic. Inorg Mater 56, 1516–1520 (2020). https://doi.org/10.1134/S0020168520150078
- low temperatures
- ductile–brittle transition
- impact toughness
- heat-affected zone
- loss of plasticity