PSI - Issue 30

E.G. Grigoryev et al. / Procedia Structural Integrity 30 (2020) 33–39 Grigoryev E. . et al. / StructuralIntegrity Procedia 00 (2020) 000–0 0

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Fig. 7. Microstructure of HfC obtained by HVEC.

Fig. 8. Energy spectral analysis of the distribution of Hf and C at the fracture of the sample obtained by the HVEC.

An analysis of the microstructure of the consolidated sample shows that the HfC grains are diamond-shaped with sizes of 1-4 μ m similar to the original HFC powder. The distribution of the Hf and C elements in the consolidated sample corresponds to the phase composition of the initial powder material, as can be seen from the energy spectral

analysis, Fig. 8. 4. Conclusions

The applied schemes of capacitor welding of alloys in hard conditions often do not allow minimizing the processes of atomic heterodiffusion or reactive diffusion, which contributes to the nucleation of intermetallic phases. High-voltage capacitor welding with an induction-dynamic drive makes it possible to obtain welded joints in super-rigid modes, minimizing the likelihood of intermetallic phases. At the same time, diffusion processes do not

have time to develop. Acknowledgements

The study of HfC high-voltage consolidation was carried out with financial support from the Russian Science Foundation grant No. 16-19-10213. References Kaleko, D.M., 2013. Welding of steel hairpins to aluminum sheets. Automatic welding 8 (724). 38-42. Larikov, L.N., Ryabov, V.R., Falchenko, V.M., 1975. Diffusion processes in the main phases during welding. Handbook, M.: Mechanical Engineering, pp. 192. Martynenko, V.T., 1984. Development of the technological process of condenser relief welding along the contour of parts of various thickness as applied to the production of heat engineering control devices: PhD thesis: 05.04.05 / Martynenko Vladimir Tikhonovich, Moscow, scientific chief N.L. Kaganov, M., pp. 204. Nescoromniy, S.V., Kufa, A.S., Inasaridze, G.I., 2018. Optimization of the parameters of high-voltage capacitor welding from dissimilar aluminum-copper alloys. Theory and practice of welding production. Scientific and technical conference dedicated to the 80th anniversary of the Department of Machines and Automation of Welding Production, Don State Technical University, 77-85.