Surface Modification of GTE Parts Samples Made from CoCrMo by Additive Technologies while Irradiation by Pulsed Electron Beams Irradiation

Aeronautical and Space-Rocket Engineering


Аuthors

Erikov K. M.1*, Bytzenko O. A.2

1. United Engine Corporation, Moscow, Russia
2. Moscow Machine Building Enterprise named after V.V.Chernyshev, 7, Vishnevaya St., Moscow, 125362, Russia

*e-mail: kirillerikov96@gmail.com

Abstract

The article considers the modes of the machining by pulsed electron beams effect on the surface roughness and micro-hardness of the samples from the CoCrMo system alloy obtained by the additive technologies. The authors formulated the basic disadvantages of conventional production and post-production methods, which lies in the fact that billets from cobalt-chromium allows are being obtained for the most part by casting by the investment casting due to the poor machinability, formability and weldability. This casting method is quite laborious, and there is a risk of obtaining metallurgical defects as well. Besides, the the new technological process development and the production preparation require significant material and time costs. The authors proposed a post-processing technique with the high-current pulsed electron beams. RITM-SP integrated installation with low-energy high-current beams source and GEZA-MMP industrial installation with high-energy high-current electron beams source were employed for irradiation. The difference in surface modification by to the type of applied equipment was revealed. Namely, irradiation with a pulsed electron beam modifies a surface up to 8 microns thick with the RITM-SP installation, and over 44 microns when irradiated with the GEZA-MMP installation. Both surface and subsurface layers condition of the samples was studied by optical microscopy with a metallographic microscope. The article demonstrates that the pulsed electron beam effects significantly the labor intensity of parts machining and is a highly effective tool for surface modifying of the samples made by selective laser fusion from the CoCrMo alloy. The authors studied the interdependence of the electron beam processing modes and the positive dynamics of the important surface criteria changes (microhardness and roughness) of samples from the CoCrMo system alloy produced by additive technologies. The studies revealed that application of the pulsed electron beam processing reduces the surface roughness. While irradiating with GEZA-MMPabout 70% and with the RITM-SP about 40%, the authors managed to increase the micro-hardness by 20-25% as well. This fact is associated with the molybdenum content increase in the surface layer. The results of the conducted research substantiate the vector of further refinement of the technological process of electron beam processing of products and efforts on determining the operational properties of cobalt-chromium alloys, including fatigue trials and heat-resistant tests.

Keywords:

additive technologies, SLM technologies, post–processing, high-current pulsed electron beams, roughness, micro-hardness

References

  1. Balyakin A.V., Skuratov D.L., Khaimovich A.I., Oleinik M.A. Direct laser fusion application for powders from heat resistant allows in engine building. Aerospace MAI Journal, 2021, vol. 28, no. 3, pp. 202-217. DOI: 10.34759/vst-2021-3-202-217
  2. Aykut Ş., Gölcü M., Semiz S., Ergür H.S. Modeling of cutting forces as function of cutting parameters for face milling of satellite 6 using an artificial neural network. Journal of Materials Processing Technology, 2007, vol. 190, no. 1–3, pp. 199–203. DOI: 10.1016/j.jmatprotec.2007.02.045
  3. Agarwal S.C., Ocken H. The microstructure and galling wear of a laser-melted cobalt-base hardfacing alloy. Wear, 1990, vol. 140, no. 2, pp. 223–233.
  4. Aykut Ş., Bagci E., Kentli A., Yazicioglu O. Experimental observation of tool wear, cutting forces and chip morphology in face milling of cobalt based super-alloy with physical vapour deposition coated and uncoated tool. Materials & Design, 2007, vol. 28, no. 6, pp. 1880–1888. DOI: 10.1016/j.matdes.2006.04.014
  5. Shokrani A., Dhokia V., Newman S.T. Environmentally conscious machining of difficult-to-machine materials with regard to cutting fluids. International Journal of Machine Tools and Manufacture, 2012, vol. 57, pp. 83–101. DOI: 10.1016/j.ijmachtools.2012.02.002
  6. Monroy K., Delgado J., Ciurana J. Study of the pore formation on CoCrMo alloys by selective laser melting manufacturing process. Procedia Engineering, 2013, vol. 63, pp. 361–369. DOI: 10.1016/j.proeng.2013.08.227
  7. Marek I., Novák P., Mlynár J. et al. Powder metallurgy preparation of Co-based alloys for biomedical applications. Acta Physica Polonica Series A, 2015, vol. 128, no. 4, pp. 597–602. DOI: 10.12693/APhysPolA.128.597
  8. Smurov I.Yu., Movchan I.A., Yadroĭtsev I.A. et al. Vestnik MGTU “Stankin”, 2012, no. 1(18), pp. 36-38.
  9. Stimpson C.K., Snyder J.C., Thole K.A., Mongillo D. Scaling roughness effects on pressure loss and heat transfer of additively manufactured channels. Journal of Turbomachinery, 2016, vol. 139, no. 2. DOI: 10.1115/1.4034555
  10. Oleinik M.A., Balyakin A.V., Skuratov D.L., Petrov I.N., Meshkov A.A. The effect of direct laser beam energy deposition modes on single rollers and walls shaping from the HN50VMTUB heat resisting alloy. Aerospace MAI Journal, 2022, vol. 29, no. 4, pp. 243-255. DOI: 10.34759/vst-2022-4-243-255
  11. Yadroitsev I., Thivillon L., Bertrand Ph., Smurov I. Strategy of manufacturing components with designed internal structure by selective laser melting of metallic powder. Applied Surface Science, 2007, vol. 254, no. 4, pp. 980-983. DOI: 10.1016/j.apsusc.2007.08.046
  12. Balyakin A.V., Nosova E.A., Oleinik M.A. Heat treatment effect on the structure and properties of workpieces from heat-resistant nickel alloys obtained by additive technologies. Aerospace MAI Journal, 2023, vol. 30, no. 3, pp. 209-219.
  13. Brykin V.A., Ripetskii A.V., Korobov K.S. Studying Porosity, Structure Morphology and Mechanical Characteristics of the Products Obtained by Selective Laser Melting of the AlSi10Mg Alloy Powder. Aerospace MAI Journal, 2024, vol. 31, no. 2, pp. 193-205. URL: https://vestnikmai.ru/publications.php?ID=180662
  14. Dmitrieva M.O., Mel’nikov A.A., Nosova E.A., Kyarimov R.R., Krzhevitskii G.E. Studying the VT16 titanium alloy microstructure forming while compressor impeller manufacturing of the small-sized gas turbine engine by additive technologies methods. Aerospace MAI Journal, 2023, vol. 30, no. 2, pp. 196-203. DOI: 10.34759/vst-2023-2-196-203
  15. Bytsenko O.A., Filonova E.V., Markov A.B., Belova N.A. Trudy VIAM, 2016, no. 6(42). DOI: 10.18577/2307-6046-2016-0-6-10-10
  16. Poate J.M., Foti G., Jacobson D.C. Surface modification and alloying by laser, ion, and electron beams. ‎ Springer, Softcover reprint of the original 1st ed. 1983 edition (2013), 424 p.
  17. Sims C.T., Hagel W.C. The Superalloys. New York, John Wiley & Sons, 1972, 614 p.
  18. Hohmann M., Brooks G., Spiegelhauer C. Production methods and application of high-quality metal powders for spraying and molding products. Stahl und Eisen, 2005, vol. 125, no. 4, pp. 35-41.
  19. Shulov V.A., Paikin A.G., Bytsenko O.A. et al. Uprochnyayushchie tekhnologii i pokrytiya, 2010, no. 2(62), pp. 23-27.
  20. Paikin A.G., Krainikov A.V., Shulov V.A. et al. Fizika i khimiya obrabotki materialov, 2008, no. 3, pp. 56-60.

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