Avtomaticheskaya Svarka (Automatic Welding), #5, 2021, pp. 70-74
Application of fractal and metallographic analyses for evaluation of quality of welds metal
O.O. Shtofel1, V.V. Holovko1, T.G. Chyzhska2
E.O. Paton Electric Welding Institute. 11 Kazymyr Malevych Str., 03150 Kyiv, Ukraine. E-mail: firstname.lastname@example.org
NTUU «Igor Sikorsky Kyiv Polytechnic Institute». 37 Peremohi Prosp., 03056, Kyiv, Ukraine.
When analyzing the factors that determine the mechanical properties of welds, it is necessary to take into account both the
size of individual components of the structure and their morphology. It is shown that the use of the method of fractal analysis
makes it possible to numerically determine such parameters of weld metal microstructure, as the size of non-metallic inclusions,
and branching of grain boundaries, which was impossible at analysis of metallographic images. The results are obtained,
which indicate the need to include in the multifractal analysis the characteristics that describe the morphological features of
microstructural components, the distribution of non-metallic inclusions by size, and the level of doping of the solid solution.
Research directions for the development of multifractal analysis of welded joints have been identified. 10 Ref., 2 Tabl., 6 Fig.
metal of welded joints, fractal and metallographic analyses, structural parameters, mechanical characteristics
1. Shtofel, O., Golovko, V., Chyzhska, T. (2021) Fractal and metallographic analyses as an innovation in ensuring the quality of metal products. Innovative «Approaches to Ensuring the Quality of Education, Scientific Research and Technological Processes». Wydawnictwo Wyższej Szkoły Technicznej w Katowicach, 1013-1018. (ISBN 978-83-957298-6-7).
2. Kirichenko, L.O., Radivilova, T.A. (2019) Fractal analysis of self-similar and multifractal hour series. Kharkiv, Kh-NURE [in Ukrainian].
3. Haken, G. (1980) Synergetics. Moscow, Mir [in Russian]. https://doi.org/10.1007/BF01073611
4. Nikolis, G., Prigozhin, I. (1979) Self-organization in nonequilibrium systems. From dissipative structures to order through fluctuation. Moscow, Mir [in Russian].
5. Mandelbrot, B. (2009) Fractals and chaos. Mandelbrot set and other wonders. Benoit Mandelbrot. Izhevsk, RDC Regular and chaotic dynamics [in Russian].
6. Shtofel, O.O. (2019) Application of fractal analysis method to study the metal structure. Metalozn. Obrobka Met., 91(3), 40-46 [in Ukrainian]. https://doi.org/10.15407/mom2019.03.040
7. Shtofel, O.O., Chizhskaya, T.G, Kulieznova, S.S. (2020) Metallographic studies of vessel steel samples: DS, 35G/40G and steel 20 by fractal analysis. J. of Multidisciplinary Engineering Sci. Studies (JMESS), 6, 2. ISSN: 2458-925X
8. Shtofel, O.O., Rabkina, L.M. (2019) Application of fractal analysis method to study the change of metal properties. Visnyk KPI, Seriya Pryladobuduvanniya, 58(2) [in Ukrainian]. ISSN (Online) 2663-3450, ISSN (Print) 0321-2211 https://doi.org/10.20535/1970.58(2).2019.189335
9. Holovko, V.V.,Kuznetsov, V.D., Fomichov, S.K., Loboda, P.I. (2016) Nanotechnologies in welding of low-alloy highstrength steels. Kyiv, Politekhnika [in Ukrainian].
10. Poyarkova, E.V. (2019) Fractal analysis in diagnostics of the structures of materials: Procedural recommendations. Orenburg, Orenb. State University [in Russian].
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