Continual description of polycrystalline systems taking into account their structure

Authors

DOI:

https://doi.org/10.15587/2312-8372.2019.156159

Keywords:

mathematical relationships of the model of polycrystalline systems, state of the grain boundaries of polycrystals, intergranular damage

Abstract

The object of research is the behavior of grain boundaries, the conditions for the formation of intergranular damage and intercrystalline destruction of polycrystalline alloys under the influence of force loads. The problem of creating internal boundary zones with given thermodynamic, physical and mechanical characteristics in alloys, the solution of which is the most promising way to improve their properties, requires the use of mathematical modeling methods. It is allow one to quantify the influence of chemical composition, heat treatment and external loads on the formation of intergranular damage to polycrystalline systems.

In the course of research based on the energy approach of describing continual media taking into account physical effects occurring on a scale commensurate with the structural components and their boundaries, the mathematical relationships of the model of polycrystalline systems are constructed. This model is the basis for calculations and establishing the stress-strain state of the material at the meso level. It is shown that the mechanical behavior of materials is influenced not only by the absolute values of the parameters of the properties of individual microvolumes of bodies, but also by their gradient.

The relationship between the presence of grain boundaries in improved steels with an increased level of energy and the ability to form intergranular damage when exposed to an external load is obtained. A conceptual approach has been developed to control the properties of the internal surfaces of the alloy section by changing their structural-energy state. This is due to the fact that the proposed model and experimental dependencies are based on a physically reasonable parameter – the relative property gradient, which determines the segregation of impurities and the separation of phases by the density of dislocations in the boundary zones of the grains.

The limiting values of the characteristics of local volumes of grains, at which the ability to form intergranular damage and intercrystallite destruction of alloys, is established. This ensures the possibility of introducing innovative technologies of grain-boundary design of the structure of metal products. It is makes possible to significantly increase the reliability parameters of machine parts in comparison with the known technologies – durability, service life, reliability with minimal economic costs.

Author Biographies

Oleg Kuzin, Lviv Polytechnic National University, 12, Bandera str., Lviv, Ukraine, 79013

PhD, Associate Professor

Department of Applied Materials Science and Materials Engineering

Bohdan Lukiyanets, Lviv Polytechnic National University, 12, Bandera str., Lviv, Ukraine, 79013

Doctor of Physics and Mathematics, Professor

Department of Applied Physics and Nanomaterials

Nikolay Kuzin, Lviv Branch of Dnipropetrovsk National University of Railway Transport, 12a, Ivanna Blazhkevich, Lviv, Ukraine, 79052 Lviv Scientific Research Institute of Forensic Expertise, 54, Lipynsky, Lviv, Ukraine, 79024

Doctor of Technical Sciences, Associate Professor of Department

Department of Rolling Stock and Track

Senior Researcher

References

  1. Watanabe, T. (1988). Grain Boundary Design For Desirable Mechanical Properties. Le Journal de Physique Colloques, 49, 507–519. doi: http://doi.org/10.1051/jphyscol:1988562
  2. Lejcek, P. (2010). Grain Boundary Segregation in Metals. Springer, 249. doi: http://doi.org/10.1007/978-3-642-12505-8
  3. Makarov, P. V. (2004). Ob ierarkhicheskoy prirode deformatsii i razrusheniya tverdykh tel. Fizicheskaya mezomekhanika, 7 (4), 25–34.
  4. Kozlov, E. V. (2003). Izmel'chenie zerna kak osnovnoy resurs povysheniya predela tekuchesti. Vestnik TGU, 8 (4), 509–513.
  5. Entsiklopedicheskiy slovar' po metallurgii (2000). Moscow: Intermet Inzhiniring, 821.
  6. Gottschalk, D., McBride, A., Reddy, B. D., Javili, A., Wriggers, P., Hirschberger, C. B. (2016). Computational and theoretical aspects of a grain-boundary model that accounts for grain misorientation and grain-boundary orientation. Computational Materials Science, 111, 443–459. doi: http://doi.org/10.1016/j.commatsci.2015.09.048
  7. Kobayashi, R., Warren, J. A., Craig Carter, W. (2000). A continuum model of grain boundaries. Physica D: Nonlinear Phenomena, 140 (1-2), 141–150. doi: http://doi.org/10.1016/s0167-2789(00)00023-3
  8. Shtremel', M. A. (1999). Prochnost' splavov. Chast' І. Defekty reshetki. Moscow: MISIS, 384.
  9. Kozlov, E. V., Zhdanov, A. N., Koneva, N. A. (2006). Bar'ernoe tormozhenie dislokatsiy. Problema Kholla-Petcha. Fizicheskaya mezomekhanika, 9 (3), 81–92.
  10. Korneva, N. A., Tishkina, L. I., Kozlov, E. V. (1998). Spektr i istochniki poley vnutrennikh napryazheniy v deformirovannykh metallakh i splavakh. Izvestiya RAN. Seriya fizicheskaya, 62 (7), 1350–1356.
  11. Mughrabi, H. (1987). A two-parameter description of heterogeneous dislocation distributions in deformed metal crystals. Materials Science and Engineering, 85, 15–31. doi: http://doi.org/10.1016/0025-5416(87)90463-0
  12. Kocks, U. F. (1970). The relation between polycrystal deformation and single-crystal deformation. Metallurgical and Materials Transactions B, 1 (5), 1121–1143. doi: http://doi.org/10.1007/bf02900224
  13. Hirth, J. P. (1972). The influence of grain boundaries on mechanical properties. Metallurgical Transactions, 3 (12), 3047–3067. doi: http://doi.org/10.1007/bf02661312
  14. Weinberg, F. (1958). Grain boundaries in metals. Canada Department of Mines and Technical Surveys, 79. doi: http://doi.org/10.4095/306660
  15. Rabotnov, Yu. N. (1959). Mekhanizm dlitel'nogo razrusheniya. Voprosy prochnosti materialov i konstruktsiy. Moscow: Izd-vo AN SSSR, 5–7.
  16. Kachanov, L. M. (1958). O vremeni razrusheniya v usloviyakh polzuchesti. Izv. AN SSSR. OTN. Mekhanika i mashinostroenie, 8, 26–31.
  17. Burak, Ya. Y., Chapli, Ye. Ya. (Eds.) (2004). Fizyko-matematychne modeliuvannia skladnykh system. Lviv: Spolom, 264.
  18. Peleshhak, R. M., Lukiyanets, B. A. (1998). Elektronnoe pereraspredelenie v okrestnosti yadra lineynoy dislokatsii. Pis'ma v zhurnal tekhnicheskoy fiziki, 24 (2), 37–41.
  19. Kuzin, N. O. (2015). Ob odnoy matematicheskoy modeli izmeneniya svoystv materiala. Prikladnaya mekhanika, 51 (4), 125–132.
  20. Afaghi-Khatibi, A., Ye, L., Mat, Y.-W. (1996). An Effective Crack Growth Model for Residual Strength Evaluation of Composite Laminates with Circular Holes. Journal of Composite Materials, 30 (2), 142–163. doi: http://doi.org/10.1177/002199839603000201
  21. Chang, K.-Y., Llu, S., Chang, F.-K. (1991). Damage Tolerance of Laminated Composites Containing an Open Hole and Subjected to Tensile Loadings. Journal of Composite Materials, 25 (3), 274–301. doi: http://doi.org/10.1177/002199839102500303
  22. Xia, S., Takezono, S., Tao, K. (1994). A nonlocal damage approach to analysis of the fracture process zone. Engineering Fracture Mechanics, 48 (1), 41–51. doi: http://doi.org/10.1016/0013-7944(94)90141-4
  23. Legan, M. A. (1994). Correlation of local strength gradient criteria in a stress concentration zone with linear fracture mechanics. Journal of Applied Mechanics and Technical Physics, 34 (4), 585–592. doi: http://doi.org/10.1007/bf00851480
  24. Kharlab, V. D. (1993). Gradientnyy kriteriy khrupkogo razrusheniya. Issledovanie po mekhanike stroitel'nykh konstruktsiy i materialov. Saint Petersburg: Sankt-Peterburgskiy gosudarstvennyy arkhitekturno-stroitel'nyy universitet, 4–16.
  25. Lebedev, A. A., Shvets, V. P. (2008). Otsenka povrezhdennosti konstruktsionnykh staley po parametram rasseyaniya kharakteristik tverdosti materialov v nagruzhennom i razgruzhennom sostoyaniyakh. Problemy prochnosti, 3, 29–37.
  26. Maugin, G. A. (1992). The thermomechanics of plasticity and fracture. Cambridge: Cambridge University Press, 350. doi: http://doi.org/10.1017/cbo9781139172400
  27. Egorov, A. I. (1988). Optimal'noe upravlenie lineynymi sistemami. Kyiv: Vyshha shkola, 278.
  28. Kuzin, O. A. (2018). Rol' izmeneniya svoystv lokal'nykh ob"emov zeren v protsessakh interkristallitnogo razrusheniya staley posle uluchsheniya. European multi science journal, 15, 27–29.
  29. Ivanova, V. S. (1986). Mekhanika i sinergetika ustalostnogo razrusheniya. Fiziko khimicheskaya mekhanika materialov, 1, 62–68.
  30. Ivanova, V. S. (1989). Sinergetika razrusheniya i mekhanicheskie svoystva. Moscow: Nauka, 167.
  31. Volkov, I. A. (2008). Uravneniya sostoyaniya vyazkouprugo-plasticheskikh sred s povrezhdeniyami. Moscow: Fizmatlit, 424.

Downloads

Published

2018-12-20

How to Cite

Kuzin, O., Lukiyanets, B., & Kuzin, N. (2018). Continual description of polycrystalline systems taking into account their structure. Technology Audit and Production Reserves, 1(1(45), 25–30. https://doi.org/10.15587/2312-8372.2019.156159

Issue

Vol. 1 No. 1(45) (2019): Industrial and technology systems

Section

Materials Science: Original Research

License

Copyright (c) 2019 Oleg Kuzin, Bohdan Lukiyanets, Nikolay Kuzin

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.