The structure of a welded joint obtained by argon-arc welding with the use of a composite electrode wire of a Ni3Al-base alloy after directed crystallization is studied. It is shown that the use of composite electrode wire containing nanoparticles of tungsten carbide for argon-arc welding promotes formation of a quality weld metal and a defect-free transition zone between the latter and the directedly crystallized alloy based on Ni3Al.
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Notes
RF Patent for Invention No. 2478029.
The tungsten carbide was obtained by thermochemical treatment of a nanosizeW – C composition at the laboratory for plasma processes in metallurgy and treatment of materials of the IMET.
The authors are thankful to engineer S. V. Skorodumov of the “International School of Microscopy” Training Scientific Center and to operator N. A. Sokolov of the Department of Nanotechnology of the Keldysh Research Center for cooperation in the electron microscopic studies.
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The work has been performed with financial support of the Russian Foundation for Basic Research within scientific projects Nos. 12-08-33103 mol a ved and 13-08-01282a.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 35 – 40, February, 2014.
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Zorin, I.V., Sokolov, G.N., Dubtsov, Y.N. et al. Structure of a Welded Joint of Directedly Crystallized Metal Based on Ni3Al. Met Sci Heat Treat 56, 93–97 (2014). https://doi.org/10.1007/s11041-014-9711-3
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DOI: https://doi.org/10.1007/s11041-014-9711-3