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Pages 559 666 3NMHT 3rd International Conference on New Materials and High Technologies Chairman Alexey Markov, Tomsk Scientific Center SB RAS, Tomsk, Russia Co-Chairman Yuri Maksimov, Tomsk Scientific Center SB RAS, Tomsk, Russia Program Chairman Alexey Markov, Tomsk Scientific Center SB RAS, Tomsk, Russia Program Co-Chairman Yuri Maksimov, Tomsk Scientific Center SB RAS, Tomsk, Russia Program Committee Sergey ZELEPUGIN Tomsk Scientific Center SB RAS, Tomsk, Russia Alexander KIRDYASHKIN Tomsk Scientific Center SB RAS, Tomsk, Russia Yuri MAKSIMOV Tomsk Scientific Center SB RAS, Tomsk, Russia International Advisory Committee Mikhail ALYMOV Merzhanov Institute of Structural Macrokinetics and Materials Science RAS, Chernogolovka, Moscow Region, Russia Alexander BARDENSHTEIN Danish Technological Institute, Taastrup, Danish Massimiliano BESTETTI Politecnico di Milano, Milan, Italy Fengchun JIANG Harbin Engineering University, Harbin, P.R. China Alexander KIRDYASHKIN Tomsk Scientific Center SB RAS, Tomsk, Russia Irina KURZINA Tomsk State University, Tomsk, Russia Nikolay LYAKHOV Institute of Solid State Chemistry and Mechanochemistry SB RAS, Novosibirsk, Russia Zulkhair MANSUROV Institute of Combustion Problems, Almaty, Kazakhstan Sergei MINAEV Far Eastern Federal University, Vladivostok, Russia Nahum TRAVITZKY Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany Zbigniew WERNER National Center for Nuclear Research, Otwock, Poland Sergey ZELEPUGIN Tomsk Scientific Center SB RAS, Tomsk, Russia Conference topics Non isothermal methods for materials synthesis Combustion waves: theory and experiment Functional materials and coatings _____________________________________________________________________________________________________________Non isothermal methods for materials synthesis COMPARATIVE ANALYSIS OF THE STRUCTURE AND INTERNAL STRESS IN TI-6AL-4V ALLOYS MANUFACTURED BY 3D PRINTING AND PROCESSING WITH SCREW EXTRUSION1 N.V.KAZANTSEVA*, I.EZHOV*, N.I.VINOGRADOVA*, A.S.FEFELOV**, MERKUSHEV A.**, ILYINIKH M.**, A.E.VOLKOV*** * Institute of Metal Physics, 620990, Ekaterinburg, Russia, [email protected] ** Regional Engineering Center of laser and additive technology, 620078, 61, Komsomolskaya Str., Ekaterinburg, Russia ***Scientific and Production Company Ruteni Ltd., 620075, 85/212, Mamina Sibiraka Str., Ekaterinburg, Russia One of the main tasks of modern developments in the production of titanium alloys is the expansion of the spectrum of metal properties using various processing methods. It is known that metals subjected to strong deformations can acquire completely new properties, most of which can be of practical interest. For example, it may combine high plasticity with great strength. The method of reverse and comprehensive extrusion with the use of screw extrusion includes several stages of ingot processing [1]. Figure 1 shows one of the stages. Additive technology is a novel surface engineering technique, which allows us to obtained Ti-6Al-V alloys with high density (about 99.9%) as cast materials [2]. In this report, we present the comparative study of the Ti-6Al-4V alloys manufactured by 3D printing and processing with screw extrusion. Horizontal Ti-6Al-4V samples were produced by the EOSINT M280 machines (EOS GmbH) equipped with an Ytterbium fiber laser operating at 1075 nm wavelength (IPG Photonics Corp.). We examined the industrial Ti-6Al-4V samples after the first twisting and after pressing the twisted sample into a round washer. According to structural studies, the deformed alloy retains a two-phase state. After the first twisting in the sample, a change in the intensity of X-ray diffraction lines indicating the presence of the texture is revealed. The grain size in the sample after pressing decreases by about half compared to the sample after pressing. It is known that 3D printing of the titanium alloys produces the samples with non-equilibrium structure with high level of internal stresses. TEM studies of 3D samples showed the martensitic structure without any precipitations. Fig. 1. Fig.1. Pressing a twisted blank into a washer Estimation of residual internal stresses in the studied samples and comparison with obtained data on influence of severe plastic deformation by screw extrusion is provided. REFERENCES [1] A.E. Volkov // Journal Titan. 2015. 1. № 47. 35-38. [2] P. Krakhmalev, G. Fredricsson, I.Yadroitseva, N. Kazantseva, A. Du Plessis, I.Yadroitsev, // Physics Procedia. 2016. 83. 778 – 788. 1 This work was supported by Russian Found of Basic Research N 17-03-00084 561 _____________________________________________________________________________________________________________Non isothermal methods for materials synthesis MAIN FACTORS AFFECTING THE STRUCTURE AND PROPERTIES OF TITANIUM AND COBALT ALLOYS MANUFACTURED BY THE 3D PRINTING1 N.V. KAZANTSEVA Institute of Metal Physics, 620990, Ekaterinburg, Russia, [email protected] Development of techniques for manufacturing finished parts from titanium alloys using additive technologies are relevant at present for both scientific and industrial purposes. Methods of 3D printing are very promising, especially for medicine, because they allow you to obtain details of complex designs and take into account the personal characteristics of the human body. When constructing parts in installations using additive technologies (selective laser fusion, selective laser synthesis, electron beam fusion), a number of characteristics are important, including the parameters of the used installation (for example, laser power), the quality and size of the powder, the distance between layers, substrate surface quality, substrate temperature, etc. [1-2]. All of this will affects the porosity, the level of residual stresses and the structure of the material, which, accordingly, determines its mechanical properties [3-4]. Additive technology is a novel surface engineering technique, which allows us to obtained Ti-6Al-V alloys with high density (about 99.9%) as cast materials [2]. The report considers the main factors affecting the structure and properties of titanium alloys Ti6Al4V and CoCrMo alloys, obtained by additive methods. A comparative analysis of the structure and properties of Ti6Al4V or CoCrMo alloys obtained using various 3D printing techniques is presented. REFERENCES [1] E. Gordon, V. Dhokia, // Proceedings of the 13th International Conference on Manufacturing Research (ICMR2015). 2015. 1-6. [2] P. Krakhmalev, G. Fredricsson, I.Yadroitseva, N. Kazantseva, A. Du Plessis, I.Yadroitsev, // Physics Procedia. 2016. 83. 778 – 788. [3] I. Yadroitsev, P. Bertrand, I. Smurov // Applied Surface Science. 2007. 253(19). 8064–8069. [4] L. E. Murr, S. M. Gaytan, F. Medina2, E. Martinez, D. H. Hernandez L. Martinez M. I. Lopez, R. B. Wicker and S. Coll // Proceedings of Solid Freeform Fabrication Symposium. 2009. 374-394. 1 This work was supported by Russian Found of Basic Research N 17-03-00084 and State assignment on the topic "Diagnostics" №АААА-А18- 118020690196-3 562 _____________________________________________________________________________________________________________Non isothermal methods for materials synthesis HIGH-ADHESION COATINGS – SURFACE ALLOYS FORMED BY LOW ENERGY HIGH CURRENT ELECTRON BEAM: PROPERTIES AND APPLICATIONS A. MARKOV*, E. YAKOVLEV*, V. PETROV**, D. SHEPEL** * Tomsk Scientific Center SB RAS, 10/4, Akademicheskii pr., Tomsk, 634055, Russia ** Institute of High Current Electronics SB RAS, 2/3, Akademicheskii pr., Tomsk, 634055, Russia Surface alloys are the high-adhesion coatings of controlled composition fused with a metallic substrate by concentrated energy fluxes. “RITM-SP” is electron-beam machine equipped by a magnetron sputtering system enabling the formation of surface alloys of required thickness [1-2]. The process of formation of surface alloys consists of the deposition of films on a treated substrate followed by a liquid- phase mixing of the deposited film and the substrate upper layer with a LEHCEB in a single vacuum cycle or in other words without breaking vacuum. The thicknesses of the resulting surface alloys may vary from tenths to tens of micrometers. In the work some examples of application of electron-beam machine RITM-SP for formation of surface alloys are given. The alloys investigated were Cu-Cr and Ag-Brass. The purpose of their formation was to enhance the mechanicals and electrical properties. SEM, TEM, optical microscopy, XRD, and element analysis were used for characterization of synthesized surface alloys. Tribological tests were carried out according to the "pin-on-disc" scheme with the TRIBOtester device (France). As a counterbody, a ball made of 100Cr6 steel of radius of 3 mm was used. The load was 2 N, friction path of 40 m, track radius of 2 mm, and a sliding speed of 25 mm/s. The tests were carried out under normal conditions without a lubricant. REFERENCES [1] Markov A.B., Mikov A.V., Ozur G.E., Padei A.G. // Instrument and experimental techniques. − 2011. − Volume 54. Pages 862- 866. [2] D. Luo, G. Tang, X. Ma, L. Gu, L. Wang, T. Wu, F. Ma // Vacuum. − 2017. − Volume 136. Pages 121-128. 563 _____________________________________________________________________________________________________________Non isothermal methods for materials synthesis FAILURE OF THE MIL COMPOSITES UNDER SHOCK WAVE LOADING1 S.A. ZELEPUGIN, A.S. ZELEPUGIN, A.A. POPOV, D.V. YANOV Tomsk Scientific Center SB RAS, 10/4 Akademicheskii Avenue, Tomsk, 634055, Russia, [email protected], +7(3822)492294 National Research Tomsk State University,
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