Vol. 24 No. 4 2022 3 EDITORIAL COUNCIL EDITORIAL BOARD EDITOR-IN-CHIEF: Anatoliy A. Bataev, D.Sc. (Engineering), Professor, Rector, Novosibirsk State Technical University, Novosibirsk, Russian Federation DEPUTIES EDITOR-IN-CHIEF: Vladimir V. Ivancivsky, D.Sc. (Engineering), Associate Professor, Department of Industrial Machinery Design, Novosibirsk State Technical University, Novosibirsk, Russian Federation Vadim Y. Skeeba, Ph.D. (Engineering), Associate Professor, Department of Industrial Machinery Design, Novosibirsk State Technical University, Novosibirsk, Russian Federation Editor of the English translation: Elena A. Lozhkina, Ph.D. (Engineering), Department of Material Science in Mechanical Engineering, Novosibirsk State Technical University, Novosibirsk, Russian Federation The journal is issued since 1999 Publication frequency – 4 numbers a year Data on the journal are published in «Ulrich's Periodical Directory» Journal “Obrabotka Metallov” (“Metal Working and Material Science”) has been Indexed in Clarivate Analytics Services. We sincerely happy to announce that Journal “Obrabotka Metallov” (“Metal Working and Material Science”), ISSN 1994-6309 / E-ISSN 2541-819X is selected for coverage in Clarivate Analytics (formerly Thomson Reuters) products and services started from July 10, 2017. Beginning with No. 1 (74) 2017, this publication will be indexed and abstracted in: Emerging Sources Citation Index. Journal “Obrabotka Metallov” (“Metal Working & Material Science”) has entered into an electronic licensing relationship with EBSCO Publishing, the world's leading aggregator of full text journals, magazines and eBooks. The full text of JOURNAL can be found in the EBSCOhost™ databases. Novosibirsk State Technical University, Prospekt K. Marksa, 20, Novosibirsk, 630073, Russia Tel.: +7 (383) 346-17-75 http://journals.nstu.ru/obrabotka_metallov E-mail: metal_working@mail.ru; metal_working@corp.nstu.ru
OBRABOTKAMETALLOV Vol. 24 No. 4 2022 4 EDITORIAL COUNCIL EDITORIAL COUNCIL CHAIRMAN: Nikolai V. Pustovoy, D.Sc. (Engineering), Professor, President, Novosibirsk State Technical University, Novosibirsk, Russian Federation MEMBERS: The Federative Republic of Brazil: Alberto Moreira Jorge Junior, Dr.-Ing., Full Professor; Federal University of São Carlos, São Carlos The Federal Republic of Germany: Moniko Greif, Dr.-Ing., Professor, Hochschule RheinMain University of Applied Sciences, Russelsheim Florian Nürnberger, Dr.-Ing., Chief Engineer and Head of the Department “Technology of Materials”, Leibniz Universität Hannover, Garbsen; Thomas Hassel, Dr.-Ing., Head of Underwater Technology Center Hanover, Leibniz Universität Hannover, Garbsen The Spain: Andrey L. Chuvilin, Ph.D. (Physics and Mathematics), Ikerbasque Research Professor, Head of Electron Microscopy Laboratory “CIC nanoGUNE”, San Sebastian The Republic of Belarus: Fyodor I. Panteleenko, D.Sc. (Engineering), Professor, First Vice-Rector, Corresponding Member of National Academy of Sciences of Belarus, Belarusian National Technical University, Minsk The Ukraine: Sergiy V. Kovalevskyy, D.Sc. (Engineering), Professor, Vice Rector for Research and Academic Affairs, Donbass State Engineering Academy, Kramatorsk The Russian Federation: Vladimir G. Atapin, D.Sc. (Engineering), Professor, Novosibirsk State Technical University, Novosibirsk; Victor P. Balkov, Deputy general director, Research and Development Tooling Institute “VNIIINSTRUMENT”, Moscow; Vladimir A. Bataev, D.Sc. (Engineering), Professor, Novosibirsk State Technical University, Novosibirsk; Vladimir G. Burov, D.Sc. (Engineering), Professor, Novosibirsk State Technical University, Novosibirsk; Aleksandr N. Gerasenko, Director, Scientifi c and Production company “Mashservispribor”, Novosibirsk; Sergey V. Kirsanov, D.Sc. (Engineering), Professor, National Research Tomsk Polytechnic University, Tomsk; Aleksandr N. Korotkov, D.Sc. (Engineering), Professor, Kuzbass State Technical University, Kemerovo; Evgeniy A. Kudryashov, D.Sc. (Engineering), Professor, Southwest State University, Kursk; Dmitry V. Lobanov, D.Sc. (Engineering), Associate Professor, I.N. Ulianov Chuvash State University, Cheboksary; Aleksey V. Makarov, D.Sc. (Engineering), Corresponding Member of RAS, Head of division, Head of laboratory (Laboratory of Mechanical Properties) M.N. Miheev Institute of Metal Physics, Russian Academy of Sciences (Ural Branch), Yekaterinburg; Aleksandr G. Ovcharenko, D.Sc. (Engineering), Professor, Biysk Technological Institute, Biysk; Yuriy N. Saraev, D.Sc. (Engineering), Professor, Institute of Strength Physics and Materials Science, Russian Academy of Sciences (Siberian Branch), Tomsk; Alexander S. Yanyushkin, D.Sc. (Engineering), Professor, I.N. Ulianov Chuvash State University, Cheboksary
Vol. 24 No. 4 2022 5 CONTENTS OBRABOTKAMETALLOV TECHNOLOGY Dyuryagin A.A., Ardashev D.V. A study of the relationship between cutting force and machined surface roughness with the feed per tooth when milling EuTroLoy 16604 material produced by the DMD method...................... 6 Ulakhanov N.S., Tikhonov A.G., Mishigdorzhiyn U.L., Ivancivsky V.V., Vakhrushev N.V. The features of residual stresses investigation in the hardened surface layer of die steels after diffusion boroaluminizing............... 18 Rubtsov V.E., Panfi lov A.O., Knyazhev E.O., Nikolaeva A.V., Cheremnov A.M., Gusarova A.V., Beloborodov V.A., Chumaevskii A.V., Ivanov A.N. Development of plasma cutting technique for C1220 copper, AA2024 aluminum alloy, and Ti-1,5Al-1,0Mn titanium alloy using a plasma torch with reverse polarity................ 33 Amirov A.I., Moskvichev E.N., Ivanov A.N., Chumaevskii A.V, Beloborodov V.A. Formation features of a welding joint of alloy Ti-5Al-3Mo-1V by the friction stir welding using heat-resistant tool from ZhS6 alloy....... 53 EQUIPMENT. INSTRUMENTS Ardashev D.V., Zhukov A.S. Investigation of the relationship between the cutting ability of the tool and the acoustic signal parameters during profi le grinding..................................................................................................... 64 Bataev D. K-S., Goitemirov R. U., Bataeva P. D. Studies of wear resistance and antifriction properties of metalpolymer pairs operating in a sea water simulator........................................................................................................ 84 Zakovorotny V.L., Gvindjiliya V.E., Fesenko E.O. Application of the synergistic concept in determining the CNC program for turning............................................................................................................................................ 98 MATERIAL SCIENCE Sokolov R.A., Novikov V.F., Kovenskij I.M., Muratov K.R., Venediktov A.N., Chaugarova L.Z. The effect of heat treatment on the formation of MnS compound in low-carbon structural steel 09Mn2Si................................ 113 Burkov А.А., Krutikova V.O. Deposition of titanium silicide on stainless steel AISI 304 surface...................... 127 Pugacheva N.B., NikolinYu.V., BykovaT.M., Goruleva L.S. Chemical composition, structure and microhardness of multilayer high-temperature coatings..................................................................................................................... 138 Saprykina N.А., Chebodaeva V.V., Saprykin A.А., Sharkeev Y.P., Ibragimov E.А., Guseva T.S. Synthesis of a three-component aluminum-based alloy by selective laser melting............................................................... 151 Gabets D.A., MarkovA.M., Guryev M.A., Pismenny E.A., NasyrovaA.K. The effect of complex modifi cation on the structure and properties of gray cast iron for tribotechnical application..................................................... 165 Ivanov I.V., Yurgin A.B., Nasennik I.E. Kuper K.E. Residual stress estimation in crystalline phases of highentropy alloys of the AlxCoCrFeNi system........................................................................................................... 181 Korosteleva E.N., Nikolaev I.O., Korzhova V.V. Features of the structure formation of sintered powder materials using waste metal processing of steel workpieces................................................................................. 192 EroshenkoA.Yu., Legostaeva E.V., Glukhov I.A., Uvarkin P.V., TolmachevA.I., Luginin N.A., Bataev V.A., Ivanov I.V., Sharkeev Yu.P. Effect of deformation processing on microstructure and mechanical properties of Ti-42Nb-7Zr alloy............................................................................................................................................. 206 Kutkin O.M., Bataev I.A., Dovzhenko G.D., Bataeva Z.B. The study of characteristics of the structure of metallic alloys using synchrotron radiation computed laminography (Research Review)................................ 219 EDITORIALMATERIALS 243 FOUNDERS MATERIALS 255 CONTENTS
OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 Residual stress estimation in crystalline phases of high-entropy alloys of the AlxCoCrFeNi system Ivan Ivanov 1, a, *, Aleksandr Yurgin 1, b, Igor Nasennik1, с, Konstantin Kuper2, 3, d 1 Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation 2 Budker Institute of Nuclear Physics of the Siberian Branch of the RAS, 11, Ac. Lavrentieva ave., Novosibirsk, 630090, Russian Federation 3 Federal Research Center Boreskov Institute of Catalysis, 11, Ac. Nicolskiy ave., Koltsovo, 630559, Russian Federation a https://orcid.org/0000-0001-5021-0098, i.ivanov@corp.nstu.ru, b https://orcid.org/0000-0003-0473-7627, yurgin2012@yandex.ru, с https://orcid.org/0000-0003-0937-5004, goga.mer@mail.ru, d https://orcid.org/0000-0001-5017-6248, k.e.kuper@inp.nsk.su Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2022 vol. 24 no. 4 pp. 181–191 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2022-24.4-181-191 ART I CLE I NFO Article history: Received: 13 September 2022 Revised: 26 September 2022 Accepted: 06 October 2022 Available online: 15 December 2022 Keywords: High-entropy alloys AlxCoCrFeNi Plastic deformation Residual stresses Synchrotron X-ray diffraction Funding This study was funded according to Russian Science Foundation research project № 20-73-10215 “In-situ study of the evolution of the dislocation structure of plastically deformed highentropy alloys under high-pressures and temperatures using synchrotron radiation”. Research was conducted at core facility “Structure, mechanical and physical properties of materials”. ABSTRACT Introduction. All plastically deformed alloys are characterized by crystal defects that increase the internal energy of the system. These defects also result in residual stresses that have a complex effect on the material properties. Macrostresses are often the most critical and can lead to warpage, reduced corrosion resistance, and changes in material strength characteristics. The purpose of this work is to assess the residual stresses of the primitive cubic phase of high entropy alloys Al0.6CoCrFeNi and AlCoCrFeNi. Research methods. The crystal structure of the alloys is studied using the method of X-ray diffraction analysis. Experiments on X-ray diffraction analysis were carried out at the Siberian Center for Synchrotron and Terahertz Radiation on a VEPP-4 (Novosibirsk, INF SB RAS, 5-A line «X-ray microscopy and tomography»). Studies using synchrotron radiation were carried out in the transmission mode. The evaluation of the residual macrostresses of the crystalline phases of the alloys was based on the analysis of the change in the shape of the diffraction rings with a change in the azimuth angle (χ). Materials. The objects of research are ingots of high-entropy alloys Al0.6CoCrFeNi and AlCoCrFeNi. The ingots were obtained from pure metals by argon arc melting with cooling on a copper plate. To conduct further studies, cylindrical samples are cut from the ingots, which were subjected to plastic deformation according to the uniaxial compression scheme. Results and discussion. The obtained results indicate that the Al0.6CoCrFeNi alloy is characterized by higher macrostresses than the AlCoCrFeNi alloy. The residual deformation of the B2 phase lattice of AlCoCrFeNi alloy along the direction [100] is 2.5% at an external load of 2,500 MPa. The distortion value of the lattice of this phase for the alloy Al0.6CoCrFeNi is equal to 5.5% under similar external conditions. In addition, the plastic deformation of the Al0.6CoCrFeNi HEA did not lead to its destruction. This allows concluding that the increased ductility of this alloy is associated not only with the presence of a phase with a FCC lattice, but also with an increased compliance of the phase with a primitive lattice. For citation: Ivanov I.V., Yurgin A.B., Nasennik I.E. Kuper K.E. Residual stress estimation in crystalline phases of high-entropy alloys of the AlxCoCrFeNi system. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2022, vol. 24, no. 4, pp. 181–191. DOI: 10.17212/1994-6309-2022-24.4-181-191. (In Russian). ______ * Corresponding author Ivanov Ivan V., Ph.D. (Engineering) Novosibirsk State Technical University, 20 Prospekt K. Marksa, 630073, Novosibirsk, Russian Federation Tel.: 8 (383) 346-11-71, e-mail: i.ivanov@corp.nstu.ru Introduction High entropy alloys (HEAs) are a new and one of the most promising classes of materials [1–6]. Due to its structure, HEA have high mechanical and physical properties, which make it promising materials for various fi elds.
OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 High expectations of the HEAs applicability are due to its high phase stability [7, 8]. It is known that HEA is characterized by the formation of phases with cubic crystal lattices [9, 10]. It was believed that the arrangement of atoms in the HEA structure is completely random, which should have determined its high mechanical and physical properties. However, recent studies have shown that HEAs contain additional phases, which are characterized by a regular, but not random, arrangement of atoms in the structure [11, 12, 13, 14]. These phases often appear in the HEA structure during prolonged thermal exposure [15, 16]. For example, it is known that in some alloys of the AlxCoCrFeNi system the B2 and L12 phases with primitive cubic lattice can be formed [17, 18, 19]. The AlxCoCrFeNi system is the most promising among all highentropy alloys due to the possibility of the phase composition fl exible control by changing the aluminum content. The study of strain-stress and thermal-stress states within workpieces obtained from high-entropy alloys is very important from the point of view of the application of these alloys. It is well known that the energy of plastic deformation is accumulated in the structure of metal alloys as the residual stresses. There are three types of internal stresses: macrostresses; microstresses and static lattice distortions [20]. These stresses have a signifi cant effect on the properties of the material. The using of HEAs as structural and functional materials requires scientists and engineers to understand the evolution of internal stresses within the crystalline phases of alloys. However, now in the literature there are no studies of residual stresses and residual lattice distortions of high-entropy alloys. The purpose of this work was to evaluate the residual lattice distortions of the phases of the AlxCoCrFeNi alloys after cold plastic deformation. The plastic deformation of Al0.6CoCrFeNi and AlCoCrFeNi alloys was carried out by using the axial compression scheme. The calculation of residual lattice distortions was based on synchrotron X-ray diffraction data. The results of this work allow drawing conclusions about the mechanical properties of the phases of high-entropy alloys. Methods and Materials In this work, the objects of research were ingots of Al0.6CoCrFeNi and AlCoCrFeNi high-entropy alloys. The ingots were obtained from pure metals by using argon-arc melting and cooling on a copper substrate. The shape of the ingots was close to cylindrical. The height of the obtained ingots was about 10 mm. The diameter was about 20 mm. For the most uniform distribution of chemical elements, remelting was carried out at least 10 times. Weight loss during smelting did not exceed 0.2 %. The elemental composition of the ingots was evaluated by X-ray microanalysis using a scanning electron microscope Carl Zeiss EVO50 XVP and Oxford Instruments X-Act detector. The fi nal value of the elemental composition was determined by averaging from at least twenty different regions of the ingot. The deviation of the composition from the nominal did not exceed 0.6 %. For further studies, cylindrical samples with a height of 8 mm and a diameter of 5 mm were cut from the ingots. The resulting cylinders were deformed according to the uniaxial compression scheme on a Instron 3369 machine. At a maximum applied stress of ~2,500 MPa, the deformation of the AlCoCrFeNi was 30 % and the deformation of the Al0.6CoCrFeNi was 53 %. Based on these values, the following compression degrees were chosen: 25; 34; 45; 50 and 53 % for the Al0.6CoCrFeNi and 12; 18 and 30 % for AlCoCrFeNi. Metallographic studies of the samples were carried out by the optical microscopy using a Carl Zeiss Axio Observer microscope. Before metallographic studies, the samples were subjected to etching with a solution consisting of a copper (II) sulfate, hydrochloric acid, and water (5 ml each). The crystal structure of the alloys was studied using the X-ray diffraction analysis. XRD experiments were carried out in a transmission mode at the beamline 5-A (X-ray microscopy and tomography) at VEPP-4 synchrotron source (Budker’s Institute of Nuclear Physics, Novosibirsk, Russia). The X-ray wavelength was 0.022 nm. A mar345s image plate 2D detector with pixel size 100 × 100 mkm2 and scan area diameter 345 mm was used to record the diffraction patterns. During the experiments, twodimensional diffraction patterns were obtained. These two-dimensional diffraction patterns were azimuthally integrated [21].
OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 Results and discussion The changing of aluminum content in AlxCoCrFeNi alloys system makes it possible to control the phase composition of materials. Well known, that difference of the phase composition has a signifi cant effect on the mechanical properties of the alloys. Figure 1 shows the compression curves of the studied alloys. The Al0.6CoCrFeNi alloy has a higher ductility compared to the AlCoCrFeNi alloy. At the maximum applied stress of ~2,500 MPa, the deformation of the AlCoCrFeNi alloy was 30 %, and the deformation of the Al0.6CoCrFeNi alloy was 53 %. According to the optical metallography results, the structure of the alloys also underwent signifi cant changes after plastic deformation (Figure 2). In both cases, a change in the shape of the grains is observed. Furthermore, the plastic deformation of the Al0.6CoCrFeNi alloy with a compression ratio of 53 % (Figure 2d) does not lead to appearance of cracks. However, in the case of the AlCoCrFeNi alloy (Figure 2, c), fracture traces appear even after compression by 12 %. Well known that residual stresses are balanced in different volumes of the deformed body and affect to the position and shape of the diffraction peaks. Macrostresses are balanced in the macro-volumes of the material and lead to a change of the positions of the diffraction maxima and the shape of the diffraction rings. Microstresses are balanced within several crystallites or blocks and lead to a change in the shape (width) of the diffraction peaks. Static stresses are balanced within groups of atoms and lead to an increase of diffuse scattering and, accordingly, an increase of the background intensity. In terms of the mechanical properties of the designed product, macrostresses are the most important since it can lead to warpage. a b Fig. 1. Compression curves of AlCoCrFeNi (a) и Al0.6CoCrFeNi (b) alloys
OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 a b c d Fig. 2. Results of metallographic studies: AlCoCrFeNi alloy before deformation (a), deformed by 12% (c); Al0.6CoCrFeNi alloy before deformation (b) after 53% compression (d) Estimation of residual macrostresses of crystalline phases of alloys AlCoCrFeNi and Al0.6CoCrFeNi was based on the analysis of changes in the shape of diffraction rings with a change in the azimuth angle (). In other words, the lattice parameter was estimated for each angle . However, in this case, the positions of the diffraction maxima should be clearly distinguishable. Figure 3 shows an example of one-dimensional diffraction patterns obtained in this work. According to [11, 12], the composition of the AlCoCrFeNi alloy includes two phases characterized by cubic crystal system: disordered phase (space group 3 ) Im m and ordered phase (space group 3 Pm m, or B2 type in Strukturbericht terms). Since the lattice parameters of these phases are identical, the diffraction maxima have the same angular positions. Therefore, the analysis of lattice distortions of the AlCoCrFeNi alloy is possible only for phase peaks with a primitive lattice. In this work, the calculation was carried out using three diffraction maxima of 3 Pm m phase: (100); (111) and (210). The overlap of the diffraction peaks of 3 Im m and 3 Pm m phases is also typical for the diffraction pattern of the Al0.6CoCrFeNi alloy. At the same time, this alloy also includes a phase with the space group 3 Fm m. Therefore, the analysis of the lattice distortions of the primitive cubic phase was carried out only by the diffraction maximum (100) for Al0.6CoCrFeNi alloy. The analysis of residual macrostresses was carried out according to the obtained 2D diffraction patterns. The diffraction pattern was represented as a scanning in the coordinates “2θ — χ” (Figure 4). This type of diffraction pattern makes it possible to estimate the lattice distortions by the position of the diffraction maxima along the angle χ. For this, the approximation of the diffraction band by a periodic function is optimal.
OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 a b Fig. 3. Diffraction patterns of AlCoCrFeNi (a) and Al0.6CoCrFeNi (b) alloys subjected to uniaxial compression by 18 and 25 % respectively Fig. 4. Scanning of a two-dimensional diffraction pattern of the AlCoCrFeNi alloy after uniaxial compression by 18 %
OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 Figure 5 shows examples of scans for three diffraction maxima of the B2 phase. It follows that the presence of a crystallographic texture leads to the presence of texture maxima for the diffraction peaks (100) and (111). This fact makes it impossible to approximate the diffraction band by a function. Therefore, the analysis of residual stresses was carried out by analyzing the deviation of the average value of the intensity of the diffraction maximum from its zero-position (at the absence of internal stresses). a b c Fig. 5. Diffraction maxima (100) (a), (111) (b) and (210) (c) in the coordinates « – 2θ» of B2 phase after uniaxial compression of alloy AlCoCrFeNi by 18 % Figure 6, a shows the dependence of the residual lattice distortions on the applied stresses. The largest increase in stresses occurs along the [100] direction. This is due to the anisotropy of the crystal lattice of the B2 phase. At an applied stress of ~2,500 MPa, the residual distortion of the lattice along this direction was 2.25 %. In addition, the sample before deformation (i.e., in the cast state) is also characterized by the presence of lattice distortions, which is associated with the presence of thermal stresses during cooling of the ingot. An analysis of the Al0.6CoCrFeNi alloy showed that the B2 phase of this sample is characterized by a more signifi cant lattice distortion. According to the obtained results (Figure 6, b), the lattice distortion under an applied stress ~2,500 MPa was 5.5 %. This fact is in good agreement with the results of optical metallography (Figure 2). Since no cracks or other traces of destruction were found in the structure of the Al0.6CoCrFeNi alloy (Figure 2, c), it can be concluded that the structure did not relax due to its destruction. At the same time, the presence of cracks in the structure of the AlCoCrFeNi alloy (Figure 2, d) indicates to its partial relaxation. This is indicated by the values of crystal lattice distortions (Figure 6, b). The analysis of the deformation of the crystal lattice also makes it possible to estimate the values of the elastic modulus of alloys. However, since the energy of plastic deformation is stored in the structure as both macro- and microstresses, the analysis of the change of the positions of diffraction peaks makes it possible to estimate only the upper limit of possible values of the elastic modulus. However, even such estimate makes it possible to qualitatively compare the properties of the phases of the alloys. According to the obtained results, the maximum value of the elastic modulus of B2 phase of the AlCoCrFeNi alloy along the [100] direction is 111 GPa. At the same time, the maximum value of elastic modulus for the B2 phase of Al0.6CoCrFeNi alloy along the same direction is equal to 46 GPa. Thus, the lattice of the B2 phase in the AlCoCrFeNi alloy is signifi cantly less compliant than the lattice of the same phase in the Al0.6CoCrFeNi alloy.
OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 a b Fig. 6. Dependence of the deformation of the B2 lattice of AlCoCrFeNi (a) and Al0.6CoCrFeNi (b) alloys in the directions [hkl] depending on the applied stresses during deformation Conclusions 1. Plastic deformation of Al0.6CoCrFeNi and AlCoCrFeNi alloys leads to signifi cant changes in its structure. The change in grain shape is presented in both materials structure. However, traces of partial fracture are observed only in the case of the AlCoCrFeNi alloy. This fact indicates a higher plasticity of the Al0.6CoCrFeNi alloy. 2. Plastic deformation of both alloys leads to signifi cant changes in the shape and positions of the diffraction maxima of the alloys. However, due to the overlap of diffraction maxima, macrostress estimation is possible only for a primitive cubic phase. 3. According to the analysis of the change of diffraction maxima positions, the residual lattice distortions of the B2 phase along the [100] direction in AlCoCrFeNi alloy is 2.5 % at an external load of 2,500 MPa. At the same time, the value of the lattice distortion of the same phase for the Al0.6CoCrFeNi alloy is 5.5 %. This fact indicates the presence of high residual stresses in the structure of the B2 phase of the Al0.6CoCrFeNi alloy. 4. The obtained results indicate that the high plasticity of the Al0.6CoCrFeNi alloy is associated not only with the presence of the fcc phase, but also with the high compliance of the primitive cubic lattice.
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