Scientific basis for cold brittleness of structural BCC steels and their structural degradation at below zero temperatures
Source abstract
Abstract
The paper considers the physics of cold brittleness of structural bcc steels and methods of reducing the ductile-brittle fracture temperature. A complex study was performed to examine the degradation of structural phase state of pipe steel 09Mn2Si from the main gas pipeline of Yakutia after long-term (over 3 0 years) operation. Important regularities of degradation of pearlite colonies with carbide precipitation on ferrite grain boundaries were revealed. This phenomenon is associated with brittle fracture of gas pipelines. It is shown that the low-temperature kinetic processes in main pipelines which define the degradation of their structure and properties are related to interstitial athermal structural states in the zones of local crystal structure curvature. This is a fundamentally new, as yet unknown, mechanism. Pipe steels in warm rolling acquire a longitudinal textured band structure with alternating bands of initial ferrite grains and bands of fine grains with carbide precipitates formed during lamellar pearlite degradation. This type of structure allows for a shift of ductile-brittle transition temperature down to -80°C and ductility δ = 22% at this temperature. The production of high-curvature vortex structure in pipe steel surface layers results in a 3.5-fold increase in their service life.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Material Properties and Failure Mechanisms · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
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1. Trefilov, V.I., Milman, Yu.V., and Firsov S.A., Physics of Strength of Refractory Materials, Kiev: Naukova Dumka, 1975.
2. Gumerov, A.G., Zainullin, R.S., Yamaleev, K.M., and Roslyakov, A.V., Aging of Oil Line Pipes, Moscow: Nedra, 1995.
3. Bolshakov, A.M., Golikov, N.I., Syromyatnikova, A.S., Alekseev, A.A., and Tikhonov, R.P., Fracture and Damage of Oil and Gas Industry Constructions in Long-Term Operation, Gaz. Promysh., 2007, no. 7, pp. 89–91.
4. Lyakishev, N.P., Kantor, M.M., Timofeev, V.N., Voronin, V.N., and Sharygin, Yu.M., Structural Investigation of a Gas-Pipeline Metal after Long Operation, Russ. Metallurg., 2005, no. 1, pp. 1–11.
5. Chukhareva, N.V., Mironov, S.A., and Tikhonova, T.V., Analysis of Causes of Accidents of the Main Pipelines Operating in the Far North from 2000 to 2010, Neftegazov. Delo, 2011, no. 3, pp. 231–243.
6. Sleptsov, O.I., Liglaev, A.V., Bolshakov, A.M., and Sintsov, S.A., Diagnostics and Safety of Aging Large Mechanical Systems Operating under Conditions of the Far North: The Problem and Ways to Solve It, Russ. J. Nondestr. Test., 2008, vol. 44, no. 6, pp. 395–402.10.1134/S1061830908060053 ↗
7. Syromyatnikova, A.S., Degradation of Physical and Mechanical Condition of the Main Gas Pipeline Metal at Long Operation in the Conditions of the Cryolitozone, Fiz. Mezomekh., 2014, vol. 17, no. 2, pp. 85–91.
8. Panin, V.E. and Egorushkin, V.E., Fundamental Role of Local Curvature of Crystal Structure in Plastic Deformation and Fracture of Solids, Physical Mesomechanics of Multilevel Systems 2014, AIP Conf. Proc., Panin, V.E., Psakhie, S.G., and Fomin, V.M. (Eds.), Melville: New York, American Institute of Physics, 2014, vol. 1623, pp. 475–478.
9. Panin, V.E. and Egorushkin, V.E., Curvature Solitons as Generalized Structural Wave Carriers of Plastic Deformation and Fracture, Phys. Mesomech., 2013, vol. 16, no. 4, pp. 267–286.10.1134/S1029959913040012 ↗
10. Panin, V.E., Panin, A.V., Elsukova, T.F., and Popkova, Yu.F., Fundamental Role of Crystal Structure Curvature in Plasticity and Strength of Solids, Phys. Mesomech., 2015, vol. 18, no. 2, pp.89–99.10.1134/S1029959915020010 ↗
11. Guzev, M.A. and Dmitriev, A.A., Bifurcational Behavior of Potential Energy in a Particle System, Phys. Mesomech., 2013, vol. 16, no. 4, pp. 287–293.10.1134/S1029959913040024 ↗
12. Panin, V.E., Egorushkin, V.E., and Elsukova, T.F., Physical Mesomechanics of Grain Boundary Sliding in a Deformable Polycrystal, Phys. Mesomech., 2013, vol. 16, no. 1, pp. 1–8.10.1134/S1029959913010013 ↗
13. Cherepanov, G.P., On the Theory of Thermal Stresses in a Thin Bonding Layer, J. Appl. Phys., 1995, vol. 78, no. 11, pp. 6826–6832.10.1063/1.360443 ↗
14. Panin, V.E., Synergetic Principles of Physical Mesomechanics, Phys. Mesomech., 2000, vol. 3, no. 6, pp. 5–34.
15. Panin, V.E., Elsukova, T.F., and Popkova, Yu.F., The Role of Curvature of the Crystal Structure in the Formation of Micropores and Crack Development under Fatigue Fracture of Commercial Titanium, Dokl. Phys., 2013, vol. 58, no. 11, pp. 472–475.10.1134/S1028335813110086 ↗
16. Panin, V.E., Elsukova, T.F., Popkova, Yu.F., Pochivalov, Yu.I., and Sunder Ramasubbu, Effect of Structural State in Near-Surface Layers of Commercial Titanium on Its Fatigue Life and Fatigue Fracture Mechanisms, Phys. Mesomech., 2015, vol. 18, no. 1, pp. 1–7.10.1134/S1029959915010014 ↗
17. Panin, V.E., Sergeev, V.P., Panin, A.V., and Pochivalov, Yu.I., Coatings as an Effective Method of Strengthening Modern Structural and Tool Materials, Phys. Met. Metallogr., 2007, vol. 104, no. 6, pp. 627–636.10.1134/S0031918X07120113 ↗
18. Safarov, I.M., Korznikov, A.V., Sergeyev, S.N., Gladkovskii, S.V., and Borodin, E.M., Effect of Submicrocrystalline State on Strength and Impact Toughness of Low-Carbon 12GBA Steel, Phys. Met. Metallogr., 2012, vol. 113, no. 10, pp. 1001–1006.10.1134/S0031918X12100109 ↗
19. Tabachnikova, T.I., Schastlivtsev, V.M., Yakovleva, I.L., et al., The Structure of Modern Pipe Steels, Abstracts of the 54th International Conference on Actual Problems of Strength, Yekaterinburg: Institute of Metals UrB RAS, 2013, p. 7.