Effect of Layer-by-Layer Texture Inhomogeneity on the Stress Corrosion of Gas Steel Tubes

Abstract:

Based on the data of X-ray texture and structure analysis of the material of main gas pipelines it was shown that the layerwise inhomogeneity of tubes is formed during their manufacturing. The layerwise texture inhomogeneity of steel tubes, obtained by hot rolling at the air, differs depending on variation of technological parameters of their processing in inner and outer layers, i.e. the temperature and deformation gradients, penetration of interstitial impurities into the surface layer from surrounding atmosphere etc. The thickness of the surface layer with modified texture parameters depends on the temperature of rolling and its regime. Under exploitation when stress-corrosion cracks grows and reach the layer with a modified texture, their opening is slowing down or stops because of the high mutual misorientation of grains of different layers and the necessity of changing the plane of moving cracks, what requires additional tensile stresses. Layered textures of different gas tubes were compared. It was shown that character and degree of arising inhomogeneity correlates with the tubes resistance to stress-corrosion cracking.

• Periodical: Materials Science Forum (Volume 879)
• Pages: 1025-1030
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.879.1025
• Online since: November 2016
• Authors: Yuriy Perlovich, Olga Krymskaya*, Margarita Isaenkova, Nikolay Morozov, Ilya Ryakhovskikh, Taimuraz Esiev
• Keywords: Gas Pipeline, Hot Rolling, Layerwise Inhomogeneity, Steel Tube, Stress-Corrosion Cracking, Structure, Texture

References

[1] A. Arabei et al, Steel in Translation, 39, N9 (2009) 725–732.

[2] A. Malkin et al, Corrosion: materials and protection, 2 (2010) 1-13 (in Russian).

[3] J.J. Jonas, Transformation textures associated with steel processing, in: A. Haldar, S. Suwas, D. Bhattacharjee (eds. ) Microstructure and Texture in Steels, Springer, London, 2009, pp.3-17.

DOI: 10.1007/978-1-84882-454-6_1

[4] Yu. Perlovich, M. Isaenkova, Effects of dynamical deformation ageing on structure and texture of hot-rolled sheets from alloyed bcc metals, Int J. Mater. Form. 3, N1 (2010) 1143 – 1146.

DOI: 10.1007/s12289-010-0974-y

[5] Yu. Perlovich, Development of strain hardening inhomogeneity during texture formation under rolling of BCC-metals, Numerical prediction of deformation processes and the behaviour of real materials: Proc. 15th Riso International Symposium on Materials Science, (1994).

[6] Yu. Perlovich, M. Isaenkova, O. Krymskaya, N. Morozov, Layer Texture of Hot-Rolled BCC Metal Materials and Its Significance for Main Gas Pipelines: submitted to AIP Conference Proceedings (2015).

DOI: 10.1063/1.4963530

[7] Yu. Perlovich, O. Krymskaya, M. Isaenkova at al, Effect of layerwise structural inhomogeneity on stress-corrosion cracking of steel tubes: submitted to IOP Conference Series: Materials Science and Engineering (2016).

DOI: 10.1088/1757-899x/130/1/012009

[8] Yu. Perlovich, M. Isaenkova, V. Fesenko, Zavodsckaya laboratoriya, 79 № 7-1 (2013) 25-32 (in Russian).

[9] M. Isaenkova , Yu. Perlovich, V. Fesenko, Modern methods of experimental construction of texture complete direct pole figures by using X-ray data: submitted to IOP Conference Series: Materials Science and Engineering (2016).

DOI: 10.1088/1757-899x/130/1/012055

[10] LaboTex v. 3. 0 by LaboSoft (Krakow, Poland) on http: /www. labosoft. com. pl.

[11] H. -J. Bunge, Texture Analysis in Materials Science, Butterworth, London, (1982).

[12] O. Lavigne, E. Gamboa, W. Costin et al, Microstructural and mechanical factors influencing high pH stress corrosion cracking susceptibility of low carbon line pipe steel, Engineering Failure Analysis, 42 (2014) 283-291.

DOI: 10.1016/j.engfailanal.2014.07.011

[13] J.A. Szpunar, M.A. Arafin, A new understanding of intergranular stress corrosion cracking resistance of pipeline steel through grain boundary character and crystallographic texture studies, Corrosion Science, 51 (2009) 119-128.

DOI: 10.1016/j.corsci.2008.10.006