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2021 №09 (03) DOI of Article
10.37434/tpwj2021.09.04
2021 №09 (05)

The Paton Welding Journal 2021 #09
The Paton Welding Journal, 2021, #9, 20-26 pages

Influence of deformations from static loads on impact and fracture toughness of cylindrical shells

V.P. Dyadin, Ye.O. Davydov and R.I. Dmytrienko


E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
The work is a study of the effect of accumulation of plastic deformation in the base metal of the pipeline from the action of inner pressure on the change of impact toughness of the Charpy specimens cut out in the longitudinal and circumferential directions. The studies in this direction are carried out on the specimen made from electrically-welded straight seam pipe of 630×8 from 17G1S steel. The obtained test results allow correcting the requirements to the specific work of impact specimens taking into account its possible reduction depending on the predicted plastic deformation of the structural element and anisotropic properties of the material. 17 Ref., 4 Tables, 10 Figures.
Keywords: plastic deformation, ageing, impact toughness, heat-affected zone, brittle-ductile transition temperature, fracture toughness characteristics

Received Received 25.06.2021

References

1. Babich, V.K., Gul, Yu.P., Dolzhenkov, I.E. (1972) Strain ageing of steel. Moscow, Metallurgiya [in Russian].
2. Paton, B.E., Semenov, S.E., Rybakov, A.A. et al. (2000) Ageing and procedure of evaluation of the state of metal of the main pipelines in service. The Paton Welding J., 7, 2‒10.
3. Girenko, V.S., Semenov, S.E., Goncharenko, L.V. (2001) Strain ageing of pipe steels. Tekh. Diagrost. i Nerazrush. Kontrol, 3, 32‒35.
4. Pashkov, Yu.I., Anisimov, Yu.I., Lanchakov, G.A. et al. (1996) Prediction of residual strength limit of main gas and oil pipelines taking into account the operating time. Stroitelstvo Truboprovodov, 2, 2–5 [in Russian].
5. Pashkov, Yu.N. (1996) Crack resistance of welded pipes for gas pipelines: Syn. of Thesis for Dr. of Tech. Sci. Degree. Moscow [in Russian].
6. Dyadin, V.P. (2007) Influence of pre-deformation on impact toughness of Charpy sample in fracture. The Paton Welding J., 1, 22‒26.
7. Zolotarevsky, V.S. (1998) Mechanical properties of metals. Moscow, MISIS [in Russian].
8. Mochernyuk, N.P., Krasnevsky, S.M., Lazarevich, G.I. et al. (1991) Influence of operating time of main gas pipeline and working gas pressure on physical-mechanical characteristics of pipe steel 19G. Gazovaya Promyshlennost, 3, 34–36 [in Russian].
9. Gumerov, A.G. (1998) Defectiveness of oil pipelines and methods of their repair. Moscow, Nedra [in Russian].
10. (1967) Structure and mechanical properties of metals. Moscow, Metallurgiya [in Russian].
11. Gafarov, N.A., Goncharov, A.A., Kushnarenko, V.M. (1998) Corrosion and protection of hydrogen sulfide-containing oil and gas fields. Moscow, Nedra [in Russian].
12. Girenko, V.S., Dyadin, V.P. (1990) Correlation of crack resistance characteristics of materials and welded joints with results of standard mechanical tests. Avtomatich. Svarka, 6, 1–4 [in Russian].
13. Siratori, M., Miesi, T., Mitsushima, H. (1986) Computational fracture mechanics. Moscow, Mir [in Russian].
14. Phaal, R., Madnald, K.A., Brown, P.A. (1993) Correlations between fracture toughness and Сharpy impact energy. Doc. 5605/7/93.
15. Girenko, V.S., Dyadin, V.P. (1985) Dependencies between impact toughness and fracture mechanics criteria δiс, K1с of structural steels and their welded joints. Avtomatich. Svarka, 9, 14–22 [in Russian].
16. Dyadin, V.P. (2010) Evaluation of temperature shift depending upon the specimen thickness by the force and deformation criteria of fracture mechanics. The Paton Welding J., 4, 14‒21.
17. Troitskii, V.A., Dyadin, V.P. (2011) Selection of control sections of the main pipelines for diagnostic examination. Tekh. Diagnost. i Nerazrush. Kontrol, 3, 5‒11 [in Russian].

Suggested Citation

V.P. Dyadin, Ye.O. Davydov and R.I. Dmytrienko (2021) Influence of deformations from static loads on impact and fracture toughness of cylindrical shells. The Paton Welding J., 09, 20-26.