Influence of tensile stresses on the structurally deformed state and defect formation in the near-surface layer of pipe steel

Keywords

pipe steel, structurally deformed state, mechanical characteristics, tensile stress, defects.

Cite as

Dmytrakh І. M., Syrotyuk А. М., and Leshchak R. L. Influence of tensile stresses on the structurally deformed state and defect formation in the near-surface layer of pipe steel. Physicochemical Mechanics of Materials. 2026. 62(4), 64-70. https://doi.org/10.15407/pcmm2026.04.064

Abstract

It is established that the applying of mechanical tensile stresses to specimens of pipe L450M ferritic-pearlite steel leads to the following structural changes and the formation of defects in its near-surface layer. In particular, the local weakening of ferrite grain boundaries as­sociated with pearlite colonies is observed; single crack-like defects of the order of ~ 10 mm appear; the chains of small microcracks are formed along the boundaries of ferrite grains weakened by pearlite; defects in the form of voids with a size of 10 mm, and more appear; surface cavities with a size of 10–70 mm are formed. An empirical dependence for assessing the minimum thickness of the defective near-surface layer in steel is proposed, which can be used to predict the level of applied tensile stress in order to obtain a defective near-surface layer of steel of an assigned thickness.

References

1. O. Barrera, D. Bombac, Y. Chen, T.D. Daff, E. Galindo-Nava, P. Gong, D. Haley, R. Horton, I. Katzarov, J.R. Kermode, C. Liverani, M. Stopher, and F. Sweeney, “Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum,” J. of Mater. Sci., 53, Is. 9, 6251-6290 (2018). https://doi.org/10.1007/s10853-017-1978-5
2. B. Somerday, P. Sofronis, and R. Jones (editors) Effects of Hydrogen on Materials, Proc. of the 2008 Int. Hydrogen Conf. (Jackson Lake Lodge, Grand Teton National Park, Wyoming, USA, September 7-10, 2008), ASM International (2009).
3. B. P. Somerday, and R. Sofronis (editors) Hydrogen-Materials Interaction, ASME Press, New York (2014).
4. I.M. Dmytrakh, A.M. Syrotyuk, and R.L. Leshchak, “Special diagram for hydrogen effect evaluation on mechanical characterizations of pipeline steel,” J. of Mater. Eng. and Performance, 33, Is. 7, 3441-3454 (2024). https://doi.org/10.1007/s11665-023-08215-7
5. O.P. Kononiuk, V.V. Berezovets, K.I. Vlad, and I.Y. Zavaliy, “Hydrogenation and hydrolysis properties of Mg/MgH2-Fe100−xCoxOy composites,” Mater. Sci., 61, Is. 3, 392-400 (2025). https://doi.org/10.1007/s11003-025-01005-7
6. O. Zvirko, “Hydrogen embrittlement and fracture behavior of aged pipeline steels: challenges for hydrogen transport in gas infrastructure,” Procedia Structural Integrity, 77, 484-489 (2026). https://doi.org/10.1016/j.prostr.2026.01.061
7. R.D. Vieira, I.G.N. Neto, F. Arroyo, “Line pipe manufacturing processes,” in: J. L. de França Freire, M. R. Rennó Gomes, and M. Guedes Gomes (editors) Handbook of Pipeline Engineering, Cham: Springer (2023), pp. 1-55.
8. I.M. Dmytrakh, R.L. Leshchak, and A.M. Syrotyuk, “Influence of sodium nitrite concentration in aqueous corrosion solution on fatigue crack growth in carbon pipeline steel,” Int. J. of Fatig., 128 (2019). Art. no. 105192. https://doi.org/10.1016/j.ijfatigue.2019.105192
9. H. Nykyforchyn, “In-service degradation of pipeline steels,” in: G. Bolzon, G. Gabetta, and H. Nykyforchyn (editors) Degradation Assessment and Failure Prevention of Pipeline Systems, Lecture Notes in Civil Engineering, Cham: Springer (2021), pp. 15-29. https://doi.org/10.1007/978-3-030-58073-5_2
10. S. Xiao, X. Meng, K. Shi, L. Liu, H. Wu, W. Lian, C. Zhou, Y. Lyu, and P.K. Chu, “Hydrogen permeation barriers and preparation techniques: A review,” J. of Vacuum Sci. & Technol. A, 40, Is. 6 (2022). Art. no. 060803. https://doi.org/10.1116/6.0002178
11. V.V. Panasyuk, I.M. Dmytrakh, L. Toth, O.L. Bilyi, and A.M. Syrotyuk, “A method for the assessment of the serviceability and fracture hazard for structural elements with crack-like defects,” Mater. Sci., 49, Is. 5, 565-576 (2014). https://doi.org/10.1007/s11003-014-9650-6
12. Y.Li, F. Barzagli, P. Liu, X. Zhang, Z. Yang, M. Xiao, Y. Huang, X. Luo, C. Li, H. Luo, and R. Zhang, “Mechanism and evaluation of hydrogen permeation barriers: a critical review,” Industrial & Eng. Chemistry Res., 62, 39, 15752-15773 (2023). https://doi.org/10.1021/acs.iecr.3c02259
13. Scanning Electron Microscope Zeiss EVO-40XVP. User Manual. – Cambridge: Carl Zeiss SMT Ltd., 2005. – Version 1.0. – 52 p.
14. ImageJ User Guide. Available at: http://imagej.nih.gov/ij/docs/guide
15. M.P. Savruk, A. Kazberuk, V.S. Kravets, and A.B. Chornenkyi, “Stress state of an orthotropic plate at the holes with sharp and rounded tips,” Mater. Sci., 58, Is. 6, 709-716 (2023). https://doi.org/10.1007/s11003-023-00720-3