Influence of prior deformation and hydrogenation on deformability of shell structures

Keywords

shell structures, steel, hydrogen charging, hydrogen concentration, elastic­plastic deformation, metal embrittlement, optical-digital system, fracture resistance.

Cite as

Ivanytskyi Ya. L., Maksymenko O. P., Shtayura S. Т., Hrynenko М. V., Yadzhak N. S. Influence of prior deformation and hydrogenation on deformability of shell structures. Physicochemical Mechanics of Materials. 2025. 61(6), 13–18.

https://doi.org/10.15407/pcmm2025.06.013

Abstract

Methods of deformation of cylindrical shells made of steel 45 are proposed, and the influence of residual deformations on the concentration of gaseous hydrogen absorbed by the material is evaluated. Deformation of cylindrical shells is implemented by pressing a sphere into the hollow cylinder under compression and tension. The features of each method are identified by monitoring the deformation dynamics of the samples using an optical-digital system. To compare the degree of deformation, the residual equivalent deformations of the samples are calculated. It is found that at a preliminary 21%-deformation of cylindrical shells, the concentration of hydrogen absorbed by the material increases in three times compared to undeformed material. During compression deformation of the samples, a slight increase in the concentration of absorbed hydrogen is observed as com¬pared to tension deformation for the same equivalent deformation.

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