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2021 №09 (03) DOI of Article
2021 №09 (05)

The Paton Welding Journal 2021 #09
TPWJ, 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 NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

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


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