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Microstructural Characterization of Coatings Produced by Selective Laser Melting of Ni-Powder on Titanium Alloy Substrate

Danhe Chen 1, Sergey Konovalov 1, Anastasia Golubeva 2, Vitalii Smelov 2, Kirill Osintsev 2, Yurii Ivanov 3, and Irina Komissarova 4
1. Department of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China
2. Department of Metals Technology and Aviation Materials, Samara National Research University, Samara, Russia
3. Institute of High Current Electronics of Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
4. Department of Natural Sciences, Siberian State Industrial University, Novokuznetsk, Russia

Abstract—The authors used selective laser melting of heat-resistant nickel alloy powder to assess applicability of additive technologies to deposition of nickel coatings on titanium substrate. Structure, element and phase composition of the coating was analyzed, revealing a multi-phase nature of the coating. Titanium atoms were detected in main phases of the coating, indicating diffusion saturation of sintered layer with elements of the substrate. Using methods of scanning electron microscopy sub-microcrystalline grains were found in the formed structure, owing to high-speed laser melting of the metal. Nano-dimensional particles of the second phase, which improve strength of the coating, are detected in the material and on edges of grains and sub-grains. 

Index Terms—selective laser melting, Ti alloy, Ni alloy, structure, phase composition

Cite: Danhe Chen, Sergey Konovalov, Anastasia Golubeva, Vitalii Smelov, Kirill Osintsev, Yurii Ivanov, and Irina Komissarova, "Microstructural Characterization of Coatings Produced by Selective Laser Melting of Ni-Powder on Titanium Alloy Substrate," International Journal of Mechanical Engineering and Robotics Research, Vol. 9, No. 7, pp. 954-959, July 2020. DOI: 10.18178/ijmerr.9.7.954-959

Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.