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1

Luts, A. R., Yu V. Sherina, A. P. Amosov, and A. D. Kachura. "Liquid matrix SHS manufacturing and heat treatment of Al–Mg composites reinforced with fine titanium carbide." Izvestiya. Non-Ferrous Metallurgy, no. 4 (August 21, 2023): 70–86. http://dx.doi.org/10.17073/0021-3438-2023-4-70-86.

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Aluminum matrix composites reinforced with ultra-fine refractory titanium carbide feature a unique combination of properties. They are promising structural materials. Self-propagating high-temperature synthesis (SHS) is an affordable and energy-saving composite making process. It involves the exothermic reaction between titanium and carbon (or their compounds) directly in the melt. We studied the properties of SHS composites based on the AMg2 and AMg6 commercially available alloys reinforced with 10 wt.%TiC. We investigated the macroand microstructure of the samples with XRD and EDS analysis. It was found that the β-phase is separated from α-solid solution of aluminum as early as the air cooling stage. We conducted experiments aimed at studying the effects of additional heating on the sample structure and properties and found the optimal temperature and time values. We also proposed a phenomenological model of the structural transformation sequence. We compared the physical, mechanical, and manufacturing properties and corrosion resistance of the original cold-hardened AMg2N and AMg6N alloys and the composites before and after heat treatment. It was found that additional heating reduces porosity and maintains electrical conductivity. It was also found that the compressive strength and relative strain of the composite based on the AMg2 alloy change insignificantly, while for the AMg6-based composite the reduction is more significant. Heat treatment increases the composite hardness while maintaining sufficient plastic deformation. It is confirmed by the measured values of the relative strain and the reduction ratio close to that of the original matrix alloys. It was also found that the composites retain high resistance to carbon dioxide and hydrogen sulfide corrosion.
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2

Rakhadilov, B., L. Zhurerova, W. Wieleba, Zh Sagdoldina, and A. K. Khassenov. "Features of the structure and properties formation of AMG6 alloy under the equal channel angular pressing." Bulletin of the Karaganda University. "Physics" Series 97, no. 1 (March 30, 2020): 42–49. http://dx.doi.org/10.31489/2020ph1/42-49.

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The results of experimental studies of changes in the structure, microhardness, and wear resistance of the AMG6 aluminum alloy during equal channel angular pressing (ECAP) are presented in this work. The evolution of the fine structure and the formation of secondary phases in the AMG6 alloy during ECAP were studied. The dark-field image of the structure of the AMg6 alloy in the matrix reflex showed the splitting of the material into small disoriented fragments of about 0.5 μm in size with a small-angle disorientation boundary (about 2–5°). Optimal method and modes of ECAP of the AMG6 aluminum alloy were selected of the bases of experimental research, which make it possible to obtain a workpiece with enhanced tribological and mechanical characteristics. It was established that the most intensive grinding of the grain structure in the AMG6 alloy occurs at ECAP-12 at a channel angle intersection of 120°. It is shown that with a decrease in grain size, the microhardness of the alloy AMG6 after ECAP increases by 4 times, compared with the initial state.The results of the test samples for abrasive wear showed a decrease in mass loss after 12 passes of ECAP, which indicates an increase in the wear resistance of the alloy AMG6 by 13–14 %, compared with the initial state.
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3

Uazyrkhanova, Gulzhaz, Bauyrzhan K. Rakhadilov, Alexandr Myakinin, and Zhuldyz Uazyrkhanova. "The Change in the Thin Structure and Mechanical Properties of Aluminum Alloys at Intensive Plastic Deformation." Materials Science Forum 906 (September 2017): 114–20. http://dx.doi.org/10.4028/www.scientific.net/msf.906.114.

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Electron microscopy and x-ray analysis and mechanical testing have been investigated the influence of severe plastic deformation on structure and mechanical properties of aluminum alloys. It is established that in the initial state in the alloy AMC has a high density of chaotically distributed dislocations with a density of 5-10*109 сm-2. It is shown that microdiffraction paintings in alloy AMC in the bulk of grains are observed uniformly distributed particles of the second phase. It is established that in the initial state in the alloy AMG6 there is a high density of chaotically distributed dislocations with a density of 2-6 *1010 сm-2. Determined that after ECAP the dislocation structure of alloys AMG6, AMC and changes: formed dislocation networks inside the fragments of the dislocation is practically not observed. Determined that after ECAP-12 increase the tensile strength and yield strength of alloys AMG6 and AMC.
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4

Nikitin, K. V., V. I. Nikitin, I. Yu Timoshkin, R. M. Biktimirov, and A. P. Novikov. "Hereditary influence of deformed waste on the efficiency of Al–Si–Mg and Al–Mg alloy modification." Izvestiya Vuzov. Tsvetnaya Metallurgiya (Universities' Proceedings Non-Ferrous Metallurgy), no. 3 (June 15, 2022): 38–46. http://dx.doi.org/10.17073/0022-3438-2022-3-38-46.

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The paper provides the results of studies into the effect of the charge composition on the structure and mechanical properties of Al–Si–Mg (AK9ch) and Al–Mg (AMg6l) cast aluminum alloys. It was shown that deformed waste included in the charge composition (electrical waste of aluminum and waste of beverage cans based on the 3104 alloy – for AK9ch; AMg6 alloy plates – for AMg6l) contributes to the formation of dispersed micro- and macrostructure of working alloys in the solid state. The effect of modification (AlSr20 master alloy – for AK9ch; AlTi5 master alloy – for AMg6l) on the structure and mechanical properties of alloys obtained with various charge options was studied. Experiments on the effect of the charge composition on the AK9ch and AMg6l modifiability showed that the deformed waste structure is partially inherited by working alloys through the liquid state. With similar chemical compositions, alloys obtained with an increased proportion of deformed waste in the charge composition feature by smaller micro- and macrostructure sizes and improved mechanical properties (tensile strength and tensile elongation). It was found that when a certain amount of the modifier element (0.06 % Sr for the AK9ch alloy; 0.04 % Ti for the AMg6l alloy) is exceeded in these alloys, the over-modification effect appears. This is expressed in enlarged micro- and macrostructure parameters, as well as lowered tensile strength. The results obtained show that the optimal amount of the deformed waste proportion in the charge composition will make it possible to reduce the consumption of expensive modifying master alloys with a guaranteed effect of modification in practice.
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5

Прохоров, В. М., and Е. Л. Громницкая. "Зависимость от давления коэффициентов упругости алюминий-магниевого сплава AMg6 и нанокомпозитного сплава n-Mg6/C-=SUB=-60-=/SUB=-." Физика твердого тела 60, no. 4 (2018): 765. http://dx.doi.org/10.21883/ftt.2018.04.45690.300.

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AbstractThe ultrasonic study results for dependence of the elastic wave velocities and second-order elasticity coefficients of the polycrystalline aluminum alloy AMg6 and its nanocomposite n -AMg6/C_60 on hydrostatic pressure up to 1.6 GPa have been described. The ultrasonic research has been carried out using a highpressure ultrasonic piezometer based on the piston-cylinder device. The pressure derivatives of the secondorder elastic constants of these materials established in the present study have been compared with the results of the third-order elastic constants measurements of the test alloys using the Thurston–Brugger method. Involving available literature data, we determined the relationships between the pressure derivatives of the second-order elastic constants of the AMg6 alloy and the Mg-content and nanostructuring.
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6

Lobanov, L. M., M. O. Pashchyn, O. M. Tymoshenko, P. V. Goncharov, O. L. Mikhodui, and K. V. Shiyan. "Increase in the life of welded joints of AMg6 aluminum alloy." Paton Welding Journal 2020, no. 4 (April 28, 2020): 2–8. http://dx.doi.org/10.37434/tpwj2020.04.01.

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7

Goncharova, O. A., D. S. Kuznetsov, N. N. Andreev, N. P. Andreeva, and Yu I. Kuznetsov. "Chamber corrosion inhibitors of aluminum alloy AMG6." Corrosion: Materials, Protection, no. 8 (August 21, 2019): 23–28. http://dx.doi.org/10.31044/1813-7016-2019-0-8-23-28.

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8

Ovchinnikov, Viktor, Viktorya Berezina, and Tat'yana Skakova. "A normalized method for determining the influence on the fixed joints tightness using the technology of the sealing surface job." Science intensive technologies in mechanical engineering 2021, no. 11 (November 30, 2021): 20–29. http://dx.doi.org/10.30987/2223-4608-2021-11-20-29.

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On the basis of metallographic analysis and test results of samples of welded junctions of aluminum alloys AMg6 and D16T, made by friction stir welding, for static stretching, it is shown that destruction occurs in the zone of thermo-mechanical action for the AMg6 alloy and in the zone of thermal influence for the D16T alloy. At the same time, the dependence of the temporary resistance value of the welded junction on the state of the seam weld face has not been revealed. Tests for low-cycle fatigue have shown that the endurance limit is clearly dependent on the amount of seam weld face roughness. The value of the roughness of the seam weld face for the studied alloys has been determined, in which the nature of the fracture during the low-cycle fatigue test changes from multi-stage to single-stage.
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9

Loginov, Yu N., and A. G. Illarionov. "DISCONTINUITY OF AMG6 ALUMINUM ALLOY EXTRUDED TUBE STRUCTURE." Izvestiya Vuzov. Tsvetnaya Metallurgiya (Proceedings of Higher Schools. Nonferrous Metallurgy), no. 6 (March 1, 2015): 35. http://dx.doi.org/10.17073/0021-3438-2013-6-35-40.

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10

Goncharova, O. A., D. S. Kuznetsov, N. N. Andreev, Yu I. Kuznetsov, and N. P. Andreeva. "Chamber Inhibitors of Corrosion of AMg6 Aluminum Alloy." Protection of Metals and Physical Chemistry of Surfaces 56, no. 7 (December 2020): 1293–98. http://dx.doi.org/10.1134/s2070205120070060.

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11

Yasnii, P. V., S. I. Fedak, V. B. Glad'o, and M. P. Galushchak. "Jumplike Deformation in AMg6 Aluminum Alloy in Tension." Strength of Materials 36, no. 2 (March 2004): 113–18. http://dx.doi.org/10.1023/b:stom.0000028300.06024.59.

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12

Prokhorov, V. M., and E. L. Gromnitskaya. "Pressure Dependences of Elastic Constants of AMg6 Aluminum–Magnesium Alloy and n-AMg6/С60 Nanocomposite Alloy." Physics of the Solid State 60, no. 4 (April 2018): 769–73. http://dx.doi.org/10.1134/s106378341804025x.

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13

Rushchits, S. V., E. V. Aryshensky, S. M. Sosedkov, and A. M. Akhmed'yanov. "Modeling the Hot Deformation Behavior of 1565ch Aluminum Alloy." Key Engineering Materials 684 (February 2016): 35–41. http://dx.doi.org/10.4028/www.scientific.net/kem.684.35.

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The deformation behavior of 1565ch alloy under the plane-strain conditions in the temperature range of 350–490 оС and strain rates range of 0,1–10 s-1 is studied. The expression for steady flow stress as the functions of temperature of deformation and strain rate is obtained. It is established that 1565ch alloy with zirconium addition shows higher strain resistance and less tendency to dynamic and static recrystallization than AMg6.
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14

Sharapova, Dinaida M., Mikhail G. Sharapov, and Nikolay I. Sharonov. "Structure Formation of Butt Joints Made of Aluminum Alloys to Ensure the Quality of Mechanical Engineering Products." Materials Science Forum 1022 (February 2021): 119–26. http://dx.doi.org/10.4028/www.scientific.net/msf.1022.119.

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The article discusses the problems of ensuring high-quality formation and normative properties of butt joints of the 1560M and 1980T1 (AMg6 and B48) aluminum alloys as applied to engineering. A method is proposed for joining materials by means of EBW using an electron beam sweep. Homogeneous and dissimilar joints have been investigated, heat treatment of joint from the 1980T1 alloy and a dissimilar joint from the 1560M + 1980T1 alloys is recommended. The paper also presents the results of mechanical properties testing, the corrosion resistance and the delayed fracture tests. A welding technology that makes it possible to obtain high-quality butt-welded joints from aluminum alloys in thicknesses up to 40 mm has been developed and implemented.
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15

Gololobov, A. V., A. N. Nyafkin, and A. N. Zhabin. "ASPECTS OF STRUCTURE FORMATION DISPERSION-STRENGTHENED METAL COMPOSITE MATERIAL OBTAINED ON THE BASIS OF SHAVINGS AND POWDER OF ALUMINUM CORROSION-RESISTANT ALLOY." Proceedings of VIAM, no. 12 (2021): 39–46. http://dx.doi.org/10.18577/2307-6046-2021-0-12-39-46.

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A metal composite material (MCM) based on an aluminum corrosion-resistant alloy of the AMg6 brand, containing 22.5 % (vol.) Silicon carbide, obtained by mechanical alloying, has been investigated. Aspects of the formation of the MCM structure based on chips and powder from this alloy are considered. The influence of the initial components on the structure of the dispersion-strengthened MCM was investigated, and samples were made from this composite material.
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16

Korobov, A. I., A. I. Kokshaiskii, V. M. Prokhorov, I. A. Evdokimov, S. A. Perfilov, and A. D. Volkov. "Mechanical and nonlinear elastic characteristics of polycrystalline AMg6 aluminum alloy and n-AMg6/C60 nanocomposite." Physics of the Solid State 58, no. 12 (December 2016): 2472–80. http://dx.doi.org/10.1134/s106378341612012x.

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17

Yasniy, Oleh, Iaroslav Pasternak, Iryna Didych, Sergiy Fedak, and Dmytro Tymoshchuk. "Methods of jump-like creep modeling of AMg6 aluminum alloy." Procedia Structural Integrity 48 (2023): 149–54. http://dx.doi.org/10.1016/j.prostr.2023.07.141.

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18

Lukonina, Natalya, E. Nosova, and Fedor V. Grechnikov. "The Effect of Annealing on Mechanical Properties, the Number of Fluidity, and the Size of Coherent Scattering Regions in AMg1, AMg5, and AMg6 Alloys." Solid State Phenomena 284 (October 2018): 470–75. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.470.

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The paper presents the results of research of the structural blocking influence in Al-Mg sheet aluminum alloys on the change in mechanical properties and the stamp ability after cold working and annealing. The study was provided on sheet billets of AlMg1, AlMg5 and AlMg6 alloys containing respectively 1, 5 and 6 mass.% Mg. The initial thickness of the blanks is 2.5 mm. The blanks were cold rolled with a reduction rate of 30%. To eliminate the cold working hardening alloys were subjected to annealing at temperatures of 380 and 420°C for 1 hour. The charts of tensile strength, yield stress, and elongation change are plotted, depending on the state of the samples. Stamping was evaluated by the stamping ratio σ0.2/σb. To analyze the alloys’ grain structure blocking, the change in the size of the coherent scattering areas was estimated on the basis of X-ray diffraction studies. It is established that annealing leads to a significant decrease in the tensile strength, yield stress and elongation growth of alloys AlMg1, AlMg5 and AlMg6 sheet samples in the annealing temperature interval 380...420 ̊С. Despite the high plasticity of the AlMg1 alloy, it has lower stamping characteristics than alloys with higher magnesium content (AlMg5 and AlMg6). The yield stress of alloys decreases with increasing of annealing temperature, which indicates an increase in their stamping ability after annealing. The change in the coherent scattering areas sizes in alloys depends on the magnesium content. With an increase in the magnesium content, the coherent scattering area size increase with the annealing temperature. For an AlMg1 alloy, annealing after cold rolling does not lead to a change in the coherent scattering area size.
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19

Lobanov, L. M., M. O. Pashchyn, O. M. Tymoshenko, P. V. Goncharov, O. L. Mikhoduj, and K. V. Shiyan. "Increase in the life of welded joints of AMG6 aluminum alloy." Avtomatičeskaâ svarka (Kiev) 2020, no. 4 (April 28, 2020): 3–10. http://dx.doi.org/10.37434/as2020.04.01.

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20

Volkov, A. D., A. I. Kokshaiskii, A. I. Korobov, and V. M. Prokhorov. "Second- and third-order elastic coefficients in polycrystalline aluminum alloy AMg6." Acoustical Physics 61, no. 6 (November 2015): 651–56. http://dx.doi.org/10.1134/s1063771015060147.

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21

Golubev, V. K., A. I. Korshunov, S. A. Novikov, Yu S. Sobolev, and N. A. Yukina. "Strength and failure of aluminum alloy AMg6 with shock-wave loading." Journal of Applied Mechanics and Technical Physics 29, no. 2 (1988): 274–80. http://dx.doi.org/10.1007/bf00908594.

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22

Abramova, M. G., A. A. Goncharov, and Ya Yu Nikitin. "Study of the corrosion resistance of aluminum alloy AMg6 and steel 12Kh18N10T in conditions of loading under the impact of environmental factors." Industrial laboratory. Diagnostics of materials 87, no. 6 (June 18, 2021): 33–40. http://dx.doi.org/10.26896/1028-6861-2021-87-6-33-40.

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Stress corrosion cracking is one of the most dangerous types of corrosion damage in metallic materials. We present the results of studying the impact of environmental factors on the susceptibility of AMg6 aluminum alloy and 12Kh18N10T stainless steel to stress corrosion cracking under four-point bending. Tests of loaded samples were carried out in laboratory and field conditions of the moderately warm climate of the coastal zone over a period of six months. The samples were examined daily with fixation of the time to their destruction and upon completion of the tests the appearance of the samples and the depth of intergranular corrosion on microsections were assessed. A 3D relief was constructed using macro photography of the surface with the determination of the depth of corrosion foci. We also carried out a comparative analysis of the frequency of stress-induced destruction of steel samples of various grades both in atmospheric and laboratory conditions. It is shown that in atmospheric conditions characterized by the presence of dust particles acting as concentrators for the formation of corrosion foci, the aggressiveness of the corrosive effect of the environment increases, whereas the general corrosion resistance of materials decreases. The most pronounced effect of the environment was recorded in AMg6 alloy samples when exposed under a ventilated canopy in conditions of periodic spraying of seawater aerosols. The depth of surface corrosion damage was up to 0.1 mm. When the test samples were exposed under other conditions (salt fog chamber and louvered storage) the corrosion damage was absent. The results obtained can be used to predict the corrosion resistance of the products made of AMG6 alloy and 12Kh18N10T steel when operated in conditions of loading under the impact of environmental factors.
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23

Bisyk, S. P., A. F. Sanin, V. P. Poshyvalov, O. M. Aristarkhov, M. V. Prykhodko, A. I. Kuzmytska, and A. F. Lednianskyi. "Combined shock and mine protection based on aluminum alloy parts." Technical mechanics 2023, no. 1 (April 11, 2023): 76–89. http://dx.doi.org/10.15407/itm2023.01.076.

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This paper considers the use of aluminum alloy parts for combined mine protection of armored combat vehicles. The study was concerned with anti-mine shields mounted on an armored combat vehicle body model. The model was made of 16 mm armor steel. The total mass of the model (without an anti-mine shield) was 31.1 kg. An anti-mine shield was gripped between two frames and secured with bolts. To eliminate the effect of the soil on the test results, the explosive charges were installed on a 70 mm metal plate. The charges were initiated with an ED-8Zh electrodetonator. TG-50/50 explosive was used. A DYTRAN 3200B acceleration sensor was mounted at the center of the model, and the sensor signal was measured using an experimental system. To assess the model acceleration without any energy loss by elastic or plastic deformations, the acceleration of the model with a rigid anti-mine shield (a rigid armor steel plate of thickness 10 mm and mass 10.7 kg) was assessed. A finite-element simulation of the model was conducted. The effect of explosion load parameters on the model acceleration was studied. The simulated and the actual deflections were compared using an EinScan Pro 2X Plus 3D scanner. The speed and the acceleration of the model with a rigid and a plastic anti-mine shield were simulated and measured. The results showed that annealed parts made of Al-Mg alloys, in particular AMg6 alloy, absorb the explosion energy better. Any of the anti-mine shields made of AMg6 alloy reduces the acceleration at the center of the plate and thus the load on the armored vehicle body by a factor of 20…25 in comparison with the anti-mine shields made of armor steel. It was shown that annealing best provides the required physical and mechanical characteristics of the load-bearing parts of anti-mine shields, it is advisable to shape and structurize their porous energy-absorbing elements by pressing up to 33 MPa, it is most advisable to paste the porous energy-absorbing elements to the load-bearing parts, and after separate tests of load-bearing part and porous energy-absorbing element material specimens it is advisable to try out combined constructions of anti-mine shields for armored combat vehicles of different purposes.
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24

Савельева, Н. В., Ю. В. Баяндин, А. С. Савиных, Г. В. Гаркушин, С. В. Разоренов, and О. Б. Наймарк. "Формирование упругопластических фронтов и откольное разрушение в сплаве АМг6 при ударных воздействиях." Письма в журнал технической физики 44, no. 18 (2018): 39. http://dx.doi.org/10.21883/pjtf.2018.18.46610.17411.

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AbstractFull wave profiles were monitored by the laser interferometry method by means of a VISAR laser Doppler velocimeter under shock-wave loading of samples of AMg6 aluminum alloy. Analysis of these profiles was used to study the laws of elastic precursor formation and its amplitude variation during elastic–plastic transition front propagation in samples loaded by a shock wave of variable intensity. Critical stresses leading to the spall fracture of samples were determined as dependent on the strain rate under unloading.
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25

Shibkov, A. A., A. E. Zolotov, and M. A. Zheltov. "Acoustic precursor of unstable plastic deformation in the aluminum-magnesium alloy AMg6." Physics of the Solid State 52, no. 11 (November 2010): 2376–84. http://dx.doi.org/10.1134/s1063783410110259.

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26

Anikin, К. A., A. V. Apelfeld, and I. O. Kondratskiy. "Study of influence of micro-arc oxidation process duration on the characteristics of thermal control coatings for space applications." Journal of Physics: Conference Series 2144, no. 1 (December 1, 2021): 012006. http://dx.doi.org/10.1088/1742-6596/2144/1/012006.

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Abstract Thermal control coatings were obtained on the AMg6 aluminum alloy with the aid of micro-arc oxidation (MAO) process. The dependences of the thickness, roughness, porosity and thermal control properties of the coating on MAO process duration were studied. The thermal control properties (solar absorbance αs and emissivity ε) were investigated by ultraviolet–visible-near infrared spectrophotometer instrument and solar absorption reflectometer. The analysis of thickness, roughness and MAO process duration influence on the thermal control properties of the coating was carried out.
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27

Yasniy, Oleh, Iryna Didych, Sergiy Fedak, and Yuri Lapusta. "Modeling of AMg6 aluminum alloy jump-like deformation properties by machine learning methods." Procedia Structural Integrity 28 (2020): 1392–98. http://dx.doi.org/10.1016/j.prostr.2020.10.110.

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28

Rabinovich, M. Kh, V. G. Kudryashov, and M. V. Markushev. "Effect of grain size on the structural strength of the aluminum alloy AMg6." Metal Science and Heat Treatment 30, no. 8 (August 1988): 609–12. http://dx.doi.org/10.1007/bf00778267.

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29

Vovk, S. Y., N. O. Ferents, and D. V. Kharyshyn. "RESEARCH ON THE EFFECT OF PROTECTING COATING ON THE FIRE RESISTANCE OF ALUMINUM ALLOY STRUCTURES." Fire Safety, no. 34 (July 19, 2019): 16–20. http://dx.doi.org/10.32447/20786662.34.2019.03.

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Polyfunctional protective coatings based on filled polysiloxane compositions are technological and can be used to increase the fire resistance of metal structural materials due to high thermomechanical properties, which are determined by stable structural and phase composition. The influence of protective coatings on the basis of polysiloxane-filled oxide components on fire resistance of aluminum alloys is investigated in the work. The choice of the initial compositions for fire protection coatings was carried out with the aim of obtaining of expanded heat-insulating heatresistant layer on the surface of an aluminum alloy at temperatures of 473 K and higher. The methods of physico-chemical analysis have established that when heated more than 473 K as a result of thermo oxidative degradation of polysiloxane with the release of gaseous products, there is an expanding coating with the formation of a fire-proof porous heat-insulating layer on the surface of an aluminum alloy. The coefficient of expanding the coating is within the range of 9.8 ... 12.4. The reliability of the use of physicochemical criteria when choosing the component composition of the coating and the effectiveness of the fire protection function is estimated from the results of the test on the aluminum alloy AMG6 and on the model of its thermal conductivity. 20 Пожежна безпека, №34, 2019 A model of thermal conductivity of a protective coating is proposed, which consists of a layer that limits heat transfer through a two-layer wall. When exposed to the aluminum plate of the heat flow, it is heated to the depth of the coating, which leads to its expanding and the formation of a thermal barrier. The dynamics of temperature distribution during a fire on the protective coating of an aluminum alloy is predicted by simulating the heat transfer process in a homogeneous solid by a mathematical model. The theoretical and practical researches have established the dependence of the parameter of heating the protected aluminum alloy to the critical temperature, depending on the thickness of the coating. The presence on the surface of a protected alloy coating, based on the filled polysiloxane, changes the process of heat transfer to its surface, which increases the fire resistance of the structure by 3 ...4 times.
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30

Subbotin, Olekcandr, Valerii Belozerov, and Valeria Subbotinа. "Influence of microarc machining on resizing of aluminum parts." Bulletin of Kharkov National Automobile and Highway University, no. 97 (September 5, 2022): 70. http://dx.doi.org/10.30977/bul.2219-5548.2022.97.0.70.

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Problem. The change of the sizes of the processed samples (aluminum alloys) after oxidation in alkaline-silicate electrolyte at the anode-cathode mode is studied in the work. The two-layer structure of aluminum alloys after MAO processing is shown. The change in the size of the parts is determined by the phase composition of the coating. Goal. The goal is study of the changes in the size of the processed samples (aluminum alloys) after oxidation in alkaline-silicate electrolyte at the anode-cathode mode. The change of the sizes of the processed samples (aluminum alloys) after oxidation in alkaline-silicate electrolyte at the anode-cathode mode is studied in the work. Methodology. X-ray structural analysis (Dron - 3) in radiation Кα-Cu, microhardness measurement (PMT-3) with the load of 100 gr., measurement of coating thickness (vortex thickness gauge BT - 10NTs). Results. It is shown that in the case of predominant α- Al2O3 formation the δ / B ratio is 1.28, in the case of γ-Al2O3 formation, the δ / B ratio is 1.55 and in the case of mullite formation (3Al2O3 • 2SiO2) - 2.23. The calculation showed that the level of change in the size of the sample after MАO significantly depends on the phase composition of the coating. Experimental testing on different alloys and different electrolytes confirmed the different degree of change in size depending on the phase composition of the coating, which is determined by the modes of MAO and the composition of the electrolyte. Thus, the experimental value for alloy D16 subjected to MАO in different modes varies from 1.0 to 2.0; for B96 metal - 1.15-2.76; for AMg6 metal - 1.46-2.55. The results presented above relate to the total thickness of the formed coating. Given the two-layer structure of the coating and the fact that the thickness of the loose layer to be removed is 15 - 50% of the total thickness, the change in the size of the part after the final finishing of the friction surface should be insignificant. It has been experimentally established that from alloys D16, B96, AMg6 at optimal modes of MAO (thickness of wear-resistant coating 100 - 150 μm) the increase in the size of the part to the side is 5 - 10 μm. As for cast alloys (for example, Al9), the structure of the coating which contains a significant amount of mullite, the increase in the size of the part of such alloy after MАO and refining, more (compared to deformed alloys) and is 20 - 30 microns Al2O3. Originality. The calculation and research showed that the level of change in the size of the sample after MDO significantly depends on the phase composition of the coating itself. Considering the two-layer structure of the coating and the fact that the thickness of the loose layer to be removed is 15 - 50% of the total thickness, the change in the dimensions of the part after the final proofing of the surface should be insignificant. Practical value. Changes in the dimensions of the part must be taken into account when processing parts with small tolerances or eliminated by additional finishing by partially removing the main wear-resistant layer.
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31

Oborin, Vladimir, Mikhail Bannikov, Yuri Bayandin, Mikhail Sokovikov, Dmitry Bilalov, and Oleg Naimark. "FRACTAL ANALYSIS OF FRACTURE SURFACE OF ALUMINUM ALLOY AMg6 UNDER FATIGUE AND DYNAMIC LOADING." PNRPU MECHANICS BULLETIN, no. 2 (2015): 116–26. http://dx.doi.org/10.15593/perm.mech/2015.2.07.

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32

Lobanov, L. М., М. О. Pashchin, О. L. Mikhodui, О. V. Cherkashyn, and І. P. Kondratenko. "Influence of Pulsed Electromagnetic Field Treatment on the Stressed State of AMg6 Aluminum Alloy." Materials Science 57, no. 1 (July 2021): 1–8. http://dx.doi.org/10.1007/s11003-021-00507-4.

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33

Astanin, V. V., G. N. Nadezhdin, Yu N. Petrov, V. L. Svechnikov, and G. V. Stepanov. "Localization of plastic deformation in high-speed shock deformation of aluminum and AMg6 alloy." Strength of Materials 19, no. 3 (March 1987): 384–90. http://dx.doi.org/10.1007/bf01524139.

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34

Lobanov, L. M., N. A. Pashchin, A. N. Timoshenko, P. V. Goncharov, O. L. Mikhodui, and Yu M. Sidorenko. "Effect of the Electrodynamic Treatment on the Life of AMg6 Aluminum Alloy Weld Joints." Strength of Materials 49, no. 2 (March 2017): 234–38. http://dx.doi.org/10.1007/s11223-017-9862-8.

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35

Sydorenko, Yu M., M. O. Pashchyn, O. L. Mykhodui, Yu A. Khokhlova, and M. A. Khokhlov. "Effect of Pulse Current on Residual Stresses in AMg6 Aluminum Alloy in Electrodynamic Treatment." Strength of Materials 52, no. 5 (September 2020): 731–37. http://dx.doi.org/10.1007/s11223-020-00226-2.

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36

Kalinina, Nataliya, Tetyana Nosova, Stella Mamchur, Nataliya Tsokur, and Nikita Komarov. "Studying the process of modification of lithium aluminum alloys." Bulletin of Kharkov National Automobile and Highway University, no. 94 (December 16, 2021): 55. http://dx.doi.org/10.30977/bul.2219-5548.2021.94.0.55.

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The effect of modification with dispersed compositions on the grain structure and mechanical properties of industrial aluminum alloys has been studied. Aluminum alloys of the Al-Si, Al-Mg-Sc, Al-Cu-Mn systems were modified with dispersed Mg2Si powder with a particle size of up to 200 nm. The amount of modifier to be added to the melt is calculated. The physicochemical properties of dispersed Mg2Si have been studied. Melting of the AMg6, 1570, 2219, AK9ch alloys in the initial state and with the treatment of Mg2Si melts have been carried out. The action of insoluble applications, isomorphic to aluminum, the similarity of the influence of soluble elements holds only when the amount of insoluble addition exceeds the number of crystals formed arbitrarily under the same conditions. Thus, with an increase in the amount of insoluble addition, in particular silicon carbide particles, the grain size first decreases and then remains constant. The mechanism of the influence of dispersed particles of magnesium silicide on the formation of the structure of hypoeutectic aluminum alloys during crystallization is that their bulk is pushed out by the crystallization front into the liquid phase and participates in the refinement of the structural components of the alloy. To determine the optimal amount of silicon carbide modifier, industrial melting and testing were performed on specimens that underwent heat treatment according to the T6 mode (quenching and artificial aging). The quality of cast aluminum alloys during modification depends on many factors: the nature of the dispersed phase, the temperature of the melt, and the modes of its mixing with the introduction of particles. Dependences of the particle size and the amount of the modifier on the mechanical properties of the alloys have been established. The mechanism of interaction of the modifier with aluminum melt during crystallization has been established. In industrial experiments, the most effective size of SiC particles for increasing the σm of the AK9ch alloy from 115 to 260 MPa in the as-cast state has been established. The optimal content of Mg2Si (0.10 %) for increasing the σm of aluminum alloys has been determined.
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37

Keller, I. E., A. V. Kazantsev, D. S. Dudin, G. L. Permyakov, and D. N. Trushnikov. "MODELING OF THE DISTRIBUTION OF RESIDUAL POROSITY OF A METAL PRODUCT IN ADDITIVE MANUFACTURING WITH LAYER-BY-LAYER FORGING." Problems of Strength and Plasticity 84, no. 2 (2022): 247–58. http://dx.doi.org/10.32326/1814-9146-2022-84-2-247-258.

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Porosity, which occurs in products made of aluminum-magnesium alloys synthesized by wire-arc surfacing, significantly worsens the characteristics of fatigue strength. The developed technology of hybrid additive manufacturing with layer-by-layer forging of each deposited layer of material is able to minimize the porosity of the product. To select the rational parameters of the technological process, the evolution of the porosity distribution over the cross-section of a linear element after its single forging with a pneumatic hammer is investigated. A numerical model of the process is constructed in the LS-DYNA® package, where the Gurson–Tvergaard–Needleman relations are taken as constitutive equations of plastic deformation of the material and porosity evolution. To determine the parameters of the Johnson–Cook hardening law, tests of the AMg6 alloy were performed in a wide range of strain rates. The impact of the pneumatic hammer in the numerical model was calibrated using an accelerometric and strain-gauged steel target, as well as by distortions of the cross-section of a forged bar made of AMg6 alloy. Calculations according to the model are compared with experimental data, for which two linear segments were made by additive manufacturing with and without layer-by-layer forging, from the cross-sections of which the slots processed for pore visualization were prepared. With this method of pressure treatment, the decrease in porosity in the boundary layer of the workpiece mainly depends on the accumulated plastic deformations and does weakly sensitive the appearance of a stressed state. The model allows you to predict the size of the area under the hammer head depending on the processing mode, within which the porosity is eliminated by forging. The use of such modes will ensure the manufacturing of products without residual porosity in the processes of additive manufacturing by surfacing with layer-by-layer forging.
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38

Chudin, V. N., and V. I. Platonov. "Drawing with Thinning under Viscoplasticity Deformation of the Anisotropic Material." Herald of the Bauman Moscow State Technical University. Series Mechanical Engineering, no. 2 (145) (June 2023): 73–82. http://dx.doi.org/10.18698/0236-3941-2023-2-73-82.

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The paper considers the drawing process with wall thinning of the anisotropic workpieces made of high-strength materials exposed to viscoplasticity deformation. Scientific literature is paying insufficient attention to calculation of the deformation processes of workpieces exposed to viscoplasticity. Relationships are proposed to determine stresses and continuity of the workpiece material during drawing in heating the cylindrical products with a thinned wall. State of hot material viscoplasticity is accepted under the plane deformation scheme. Equilibrium equation, yield condition for anisotropic material and discontinuity kinetics equations were used making it possible to predict strength characteristics and accuracy of the products obtained. Calculations of the drawing process modes for workpieces made of the AMg6 aluminum alloy and of the VT6s titanium alloy were performed. Graphic dependences are demonstrated of alterations in the operation specific force and in the material continuity value on the motion speed of the deforming punch. At the given forming temperatures, the energy continuity equation corresponds to the aluminum alloy, and the deformation equation corresponds to the titanium alloy. Influence of the workpiece mechanical properties anisotropy on the drawing technological conditions was studied. It is shown that force modes and continuity alteration of the deformed material depend on the anisotropy coefficient at a given temperature. This factor is determined by strain strengthening of the workpiece material and softening over time
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39

Skripnyak, N. V. "The Features of Fracture Behavior of an Aluminum-Magnesium Alloy AMg6 Under High-Rate Straining." Russian Physics Journal 58, no. 5 (September 2015): 691–97. http://dx.doi.org/10.1007/s11182-015-0552-3.

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40

Rusakov, G. M., A. G. Illarionov, Yu N. Loginov, M. L. Lobanov, and A. A. Redikul’tsev. "Interrelation of Crystallographic Orientations of Grains in Aluminum Alloy AMg6 Under Hot Deformation and Recrystallization." Metal Science and Heat Treatment 56, no. 11-12 (March 2015): 650–55. http://dx.doi.org/10.1007/s11041-015-9816-3.

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41

Larikov, L. N., G. I. Prokopenko, V. I. Franchuk, and I. A. Yakubtsov. "Acoustic emission examination of embrittlement of aluminum and AMg6 alloy in interaction with liquid gallium." Soviet Materials Science 26, no. 3 (1990): 247–51. http://dx.doi.org/10.1007/bf00727350.

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42

Korolev, S. A., and A. E. Zimakov. "Computer Simulation of Thermal Processes in Arc Welding of Thick-Walled Aluminum Alloy Structures." Proceedings of Higher Educational Institutions. Маchine Building, no. 08 (725) (August 2020): 12–20. http://dx.doi.org/10.18698/0536-1044-2020-8-12-20.

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This paper presents the results of computer simulation of the thermal processes occurring during welding of thick-walled structures made of the AMg6 aluminium-magnesium alloy, widely used in modern industry. The model takes into account features associated with intensive heat removal from the welding zone caused by the large overall dimensions of the welded structure and the high thermal conductivity of the material used. In practice, these features increase the probability of formation of such defects as non-fusion of the weld with the base metal of the connected elements. Modeling was performed using the finite element method in the ANSYS software package. A geometric model was developed, and the bodies were divided into finite elements. For the areas with expected high temperature gradients, the finite elements in the geometric model were chosen to be much smaller than those in the areas further away from the welding zone. This increased the accuracy of the solution and significantly reduced the calculation time. The model of the heat source was constructed taking into account the gradual deposition of the weld metal as the welding arc moved along the connected edges. The simulation results confirmed the possibility of applying the available welding modes for the studied conditions.
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43

ABAKUMOV, A. I., G. A. KVASKOV, V. P. SOLOVYEV, V. V. SINITSYN, and H. P. WALTHER. "AN EXPERIMENTAL STUDY OF BUCKLING OF CYLINDRICAL SHELLS SUBJECTED TO STATIC AND DYNAMIC AXIAL IMPACT." International Journal of Modern Physics B 22, no. 09n11 (April 30, 2008): 1369–76. http://dx.doi.org/10.1142/s0217979208046797.

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To study structure resistance to impact loads using thin-wall cylinder units, knowledge of energy absorption parameters of these test units is required, as well as evaluations of resistance force. Buckling of cylinder test units involves formation of both axisymmetric and non-axisymmetric folds. Repeatability of buckling patterns is an important parameter of the fold formation process and, eventually, of the absorbed energy magnitude. This paper discusses buckling patterns obtained for cylinder test units of three dimension types with scales relating as 1:2:10. The units were made of three materials (steel 09G2C and two aluminum alloys, AMg6 and AMcM) and subjected to static and impact loading. For static loading, a test unit was fixed on a long measuring rod and subjected to an impact by a projectile moving at a speed of V0. The experiments were performed at three loading speeds V0 10m/s, 50 m/s, 100 m/s. No less than 5-10 tests were performed for each type of test units, i.e. for each size, material and load level, to study buckling repeatability. Impact velocity and axial compression force history were recorded in the tests. It was obtained in the testing of cylinder test units that: Repeatability of buckling patterns was observed only in the formation of the first fold, which is axisymmetric. Then buckling, in most cases, follows a non-axisymmetric path; -With test unit scale (i.e. size) increasing, its relative energy absorption capacity under impact loading (in ratio to the test unit mass) increases; - There is clear evidence that strain rate influences the material strength properties, except for the aluminum alloy AMg6, whose strength properties depend rather weakly on strain rate. These experimental findings can be used as a benchmark for verification of computer codes, as well as to study the behaviors of cylinder test units subjected to axial impact, which involve both axisymmetric and non-axisymmetric buckling shapes.
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44

Korobov, A. I., N. V. Shirgina, A. I. Kokshaiskii, and V. M. Prokhorov. "Influence of a Static Reversible Loading on Mechanical and Elastic Properties of Polycrystalline Aluminum Alloy AMg6." Acoustical Physics 64, no. 4 (July 2018): 415–21. http://dx.doi.org/10.1134/s1063771018030119.

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45

Lobanov, L. M., N. A. Pashchin, V. A. Yashchuk, and O. L. Mikhodui. "Effect of Electrodynamic Treatment on the Fracture Resistance of the AMg6 Aluminum Alloy Under Cyclic Loading." Strength of Materials 47, no. 3 (May 2015): 447–53. http://dx.doi.org/10.1007/s11223-015-9676-5.

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46

Lobanov, L. M., M. O. Pashchyn, O. L. Mikhodui, P. V. Goncharov, Yu M. Sydorenko, and P. R. Ustymenko. "Influence of the Accompanying Heating on the Efficiency of Electrodynamic Treatment of AMg6 Aluminum Alloy Welded Joints." Strength of Materials 53, no. 2 (March 2021): 222–26. http://dx.doi.org/10.1007/s11223-021-00278-y.

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47

Zemlyakova, N. V., and V. V. Kibitkin. "INVESTIGATION OF THE PLASTIC DEFORMATION AND PHASE TRANSFORMATIONS OF THE AMg6 ALUMINUM ALLOY AFTER ECAP AND FATIGUE." Tambov University Reports. Series: Natural and Technical Sciences 21, no. 3 (2016): 1000–1003. http://dx.doi.org/10.20310/1810-0198-2016-21-3-1000-1003.

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48

Ovchinnikov, V. V., N. V. Gavrilov, N. V. Gushchina, A. S. Kamenetskikh, D. P. Emlin, S. M. Mozharovskii, A. V. Filippov, and L. I. Kaigorodova. "Radiation annealing of AMg6, 1441, and VD1 aluminum alloy strips using a ribbon source of accelerated ions." Russian Metallurgy (Metally) 2010, no. 3 (March 2010): 207–13. http://dx.doi.org/10.1134/s0036029510030109.

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49

Grinberg, N. M., V. A. Serdyuk, A. M. Gavrilyako, V. A. Zolot'ko, E. L. Miloslavskaya, and L. E. Gorelkova. "Macro- and microrate of fatigue crack growth in AMg6 aluminum alloy in vacuum and at low temperatures." Strength of Materials 21, no. 7 (July 1989): 859–65. http://dx.doi.org/10.1007/bf01529606.

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50

Markashova, L. I., N. A. Pashchin, E. N. Berdnikova, O. L. Mikhodui, and Yu M. Sidorenko. "Influence of Impulsive Electric Current on the Fine Structure of Amg6 Aluminum Alloy Subjected to Electrodynamic Treatment." Materials Science 54, no. 1 (July 2018): 82–87. http://dx.doi.org/10.1007/s11003-018-0161-8.

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