Email this article The influence of tungsten carbide and boride additives on the structure and microhardness of CrFeNi equiatomic coating formed by short-pulse laser cladding
- Authors: Stepchenkov A.K.1, Makarov A.V.1, Volkova E.G.1, Estemirova S.K.2, Kharanzhevskiy E.V.3
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Affiliations:
- M.N. Mikheev Institute of Metal Physics of the Ural Branch of RAS
- Institute of Metallurgy of the Ural Branch of the RAS
- Udmurt State University
- Issue: No 1 (2024)
- Pages: 83-94
- Section: Articles
- URL: https://vektornaukitech.ru/jour/article/view/910
- DOI: https://doi.org/10.18323/2782-4039-2024-1-67-8
- ID: 910
Cite item
Abstract
A coating based on a single-phase medium-entropy CrFeNi alloy with a face centered cubic structure has good ductility, relatively high anti-corrosion properties, low cost, but insufficient strength for its widespread use. It is assumed that adding strengthening particles in the form of tungsten carbides and borides to the CrFeNi equiatomic coating will lead to an increase in its mechanical properties. This work studies the influence of tungsten carbide and boride additives on the structure and microhardness of a CrFeNi equiatomic coating. The coatings were formed by layer-by-layer short-pulse laser cladding with preplaced powder on a multifunctional laser installation equipped with a solid-state laser with a lamp pump based on an Nd:YAG crystal. The change in phase composition when adding strengthening particles was detected using X-ray diffraction analysis and transmission electron microscopy (TEM). Both methods confirmed the precipitation of Cr23C6 chromium carbide in the deposited coatings. TEM photographs indicate that the precipitated phase is distributed along the grain boundaries of the g-solid solution. The study found that the addition of 6 wt. % WC and 3 wt. % WB increases the level of microhardness of the CrFeNi coating by 26 % (from 340±6 to 430±12 HV 0.025). This occurs due to the presence of Cr23C6, WC particles in the structure and possible microdistortions of the crystal lattice of the g-phase as a result of doping with tungsten atoms released during the dissolution of tungsten borides and carbides in the process of high-temperature short-pulse laser heating.
About the authors
Aleksandr K. Stepchenkov
M.N. Mikheev Institute of Metal Physics of the Ural Branch of RAS
Author for correspondence.
Email: stepchenkov@imp.uran.ru
ORCID iD: 0000-0001-9431-0170
junior researcher
Russian Federation, 620108, Russia, Yekaterinburg, Sofya Kovalevskaya Street, 18Aleksey V. Makarov
M.N. Mikheev Institute of Metal Physics of the Ural Branch of RAS
Email: avm@imp.uran.ru
ORCID iD: 0000-0002-2228-0643
Doctor of Sciences (Engineering), Corresponding member of RAS, Head of Department of Materials Science, Head of Laboratory of Mechanical Properties
Russian Federation, 620108, Russia, Yekaterinburg, Sofya Kovalevskaya Street, 18Elena G. Volkova
M.N. Mikheev Institute of Metal Physics of the Ural Branch of RAS
Email: volkova@imp.uran.ru
ORCID iD: 0000-0003-4958-3027
PhD (Physics and Mathematics), senior researcher
Russian Federation, 620108, Russia, Yekaterinburg, Sofya Kovalevskaya Street, 18Svetlana Kh. Estemirova
Institute of Metallurgy of the Ural Branch of the RAS
Email: esveta100@mail.ru
ORCID iD: 0000-0001-7039-1420
PhD (Chemistry), senior researcher
Russian Federation, 620016, Russia, Yekaterinburg, Amundsen Street, 101Evgeny V. Kharanzhevskiy
Udmurt State University
Email: eh@udsu.ru
ORCID iD: 0000-0002-1525-2169
Doctor of Sciences (Engineering), Professor, Head of Laboratory of Physics and Chemistry of Materials
Russian Federation, 426034, Russia, Izhevsk, Universitetskaya Street, 1References
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