COMBINED HYDRODYNAMIC INSTABILITIES AND THEIR ROLE IN THE FORMATION OF MICRO- AND NANOSTRUCTURES OF MATERIALS UNDER PLASMA INFLUENCES
https://doi.org/10.57070/2304-4497-2023-1(43)-10-16
Abstract
The formation of micro- and nanostructures in titanium alloys subjected to combined treatment, including exposure to heterogeneous plasma flows and subsequent modification of the surface layer by a low-energy high-current electron beam, was studied. It is established that the main mechanism for the formation of structural-phase states of the micro and nanoscale range under the influence of plasma flows created by an electric explosion of conductors is the joint manifestation of Kelvin-Helmholtz and Rayleigh-Taylor instabilities at the interface of the media. It is shown that the maximum growth rate of disturbances with acceleration of the second layer g = 5 ×109 m/s2 and a transverse velocity of 0 m/s falls on the wavelength λm = 6.76 µm. If the velocity value of the second layer is u0 = 10 m/s, then λm = 6.23 µm, and at u0 = 50 m/s ‒ λm = 1.24 μm. The mechanism of formation of micro- and nanostructures during subsequent electron beam processing is a combined thermo-evaporative, concentration-capillary and thermoelectric instability. It is shown that if the influence of the concentration gradient, thermoelectric and evaporative effects is not taken into account, the maximum value of the growth rate will be observed at a wavelength of 113 µm. Taking into account thermoelectric phenomenon leads to a decrease in the value of λm to 48 μm. It is established that at the value of the thermoelectric coefficient γ = 0.1 V/K, the maximum growth rate is observed at λm = 300 nm.
About the Authors
Sergey A. Nevskii
Siberian State Industrial University
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Assist. Prof. of the Chair of of Natural Sciences named after Professor V.M. Finkel
Vladimir D. Sarychev
Siberian State Industrial University
Cand. Sci. (Eng.), Assist. Prof. of the Chair of of Natural Sciences named after Professor V.M. Finkel
Viktor E. Gromov
Siberian State Industrial University
Dr. Sci. (Phys.-Math.), Prof., Head of the Chair of Science named after V.M. Finkel’
References
1. Gao B., Hu L., Li S., Y.Hao, Y. Zhang, Tu G. Study on the nanostructure formation mechanism of hypereutectic Al–17.5 Si alloy induced by high current pulsed electron beam. Applied Surface Science. 2015, vol. 346, pp. 147‒157.
2. Lyu P., Peng T., Miao Y., Liu Z., Qi Gao, Zhang C., Jin Y., Guan Q., Cai J. Microstructure and properties of CoCrFeNiMo0.2 high-entropy alloy enhanced by high-current pulsed electron beam. Surf. & Coat. Tech. 2021, vol. 410, article 126911. https://doi.org/10.1016/j.surfcoat.2021.126911
3. Cherenda N.N., Basalai A.V., Shymanski V.I. et al. Modification of Ti-6Al-4V alloy element и phase composition by compression plasma flows impаct. Surface and Coatings Technology. 2018, vol. 355, pp. 148‒154.
4. Javadi A., Solouk A., Haghbin Nazarpak M., Bagheri F. Surface engineering of titanium-based implants using electrospraying and dip coating methods. Materials Science and Engineering C. 2019, vol. 99, pp. 620‒630.
5. Shulov V.A., Gromov A.N., Teryaev D.A., Engel’ko V.I. Application of high-current pulsed electron beams for modifying the surface of gas-turbine engine blades. Russian Journal of Non-Ferrous Metals. 2016, vol. 57, pp. 256‒265.
6. Fetzer R., Mueller G., An W., Weisenburger A. Metal surface layers after pulsed electron beam treatment. Surface and Coatings Technology. 2014, vol. 258, pp. 549–556.
7. Lu D., Gao B., Zhu G., Lv J., Hu L. High-current pulsed electron treatment of hypoeutectic Al–10Si alloy. High Temperature Materials and Processes. 2017, vol. 36, pp. 97‒100.
8. Panin V.E., Gromov V.E., Romanov D.A., Budovskikh E.A., Panin S.V. The physical basics of structure formation in electroexplosive coatings. Doklady Physics. 2017, vol. 62, pp. 67‒70.
9. Romanov D.A., Gromov V.E., Glezer A.M., Panin S.V., Semin A.P. Structure of electro-explosion resistant coatings consisting of im-miscible components. Materials Letters. 2017, vol. 125, pp. 25 ‒ 28.
10. Papadopoulos A., Skoulas E., Tsibidis G. D., Stratakis E. Formation of periodic surface structures on dielectrics after irradiation with laser beams of spatially variant polarisation: a comparative study. Applied Physics A: Materials Science and Processing. 2018, vol. 124, article 146. https://doi.org/10.1007/ s00339-018-1573-x
11. Khaken G. Synergetics. Moscow: Mir, 1990, 405 p. (In Russ.).
12. Khachaturyan A. G. Theory of Structural Transformations in Solids. New York: Wiley, 1983. 574 p.
13. Nevskii S., Sarychev V., Konovalov S., Granovskii A., Gromov V. Wave instability on the interface coating/substrate material under heterogeneous plasma flows. Journal of Materials Research and Technology. 2020, vol. 9 (1), pp. 539‒550.
14. Sarychev V.D., Nevskii S.A., Granovskii A.Yu., Gromov V.E. Mathematical models of the formation of gradient structures in materials under the influence of concentrated energy flows. Novosibirsk: Publishing House of SB RAS, 2019, 120 p. (In Russ.).
15. Shumlak U., Roderick N.F. Mitigation of the Rayleigh-Taylor instability by sheared axial flows. Phys. Plasmas. 1998, vol. 5, pp. 2384‒2389.
16. Olson B.J., Larsson J., Lele S.K., Cook A.W. Nonlinear effects in the combined Rayleigh-Taylor/Kelvin-Helmholtz instability. Physics of Fluids. 2011, vol. 23, article 114107.
17. Awasthi M.K. Effect of viscous pressure on Kelvin-Helmholtz instability through porous media. Journal of Porous Media. 2016, vol. 19 (3), pp. 205–218.
18. Joseph D.D., Funada T., Wang J. Potential flows of viscous and viscoelastic fluids. Cambridge: Cambridge Univ Press, 2007. 497 p.
19. Nevskii S., Sarychev V., Konovalov S., Granovskii A., Gromov V. Formation mechanism of micro- and nanocrystalline surface layers in titanium and aluminum alloys in electron beam irradiation. Metals. 2020, vol. 10, no. 10, article 1399.
20. Levchenko E.B., Chernyakov A.L. Instability of capillary waves in an inhomogeneously heated liquid under the influence of laser radiation. Fizika I Khimiya Obrabotki Materialov. 1983, no. 1, pp. 129‒141. (In Russ.).
Review
For citations:
Nevskii S., Sarychev V., Gromov V. COMBINED HYDRODYNAMIC INSTABILITIES AND THEIR ROLE IN THE FORMATION OF MICRO- AND NANOSTRUCTURES OF MATERIALS UNDER PLASMA INFLUENCES. Bulletin of the Siberian State Industrial University. 2023;(1):10-16. (In Russ.) https://doi.org/10.57070/2304-4497-2023-1(43)-10-16
Views:
8
Email this article 