THE STRUCTURE OF THE Al70Cu30 ALLOY AFTER CRYSTALLIZATION FROM THE LIQUID PHASE AT EXTREME PRESSURES

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Abstract

A comparative study of Al70Cu30 binary alloy samples obtained from the liquid phase at normal and high pressures of 3–5, 7, 8, and 10 GPa was performed using metallographic and X-ray diffraction analyses using electron microscopy. The melt temperature before quenching is 1100 and 1300 °C, the cooling rate is ~1000 °C/s. Two phases were revealed in the structure of all the obtained samples: α-Al (cubic, cF4/1) and Al2Cu (tetra, tI12/2). When solidified under a pressure of 3–4 GPa, the structure is crushed, compared with the original ingot obtained at normal pressure, the morphology of the structural components of the alloy changes. Changing the pressure from 5 to 8 GPa leads to additional refinement of the alloy microstructure. Crystallization occurs with the formation of solid solutions with a high copper content in aluminum. A pressure of 10 GPa promotes the formation of quasi-entectic in the alloy. The selected thermobaric action modes lead to an increase in the hardness of the samples, which is due to the refinement of the microstructure and the formation of solid solutions in the alloy.

About the authors

A. S Zhukova

Udmurt Federal Research Center Ural Branch of the Russian Academy of Sciences

Email: aannaa1907@mail.ru
Izhevsk, Russia

S. G Menshikova

Udmurt Federal Research Center Ural Branch of the Russian Academy of Sciences

Email: svetimensh@mail.ru
Izhevsk, Russia

References

  1. Antipov, V.V. Development strategy of titanium, magnesium, beryllium and aluminum alloys / V.V. Antipov // Aviation materials and technologies. 2012. №S. Р.157–167.
  2. Teleshov, V.V. Development of structural deformable aluminum alloys of the Al-Cu and Al-Cu-Mg systems for long-term operation at elevated temperatures / V.V. Teleshov // Technology of light alloys. 2009. №4. Р.6–31.
  3. Chirkov, E.V. The rate of softening under heating is a criterion for assessing the heat resistance of structural alloys of the Al-Cu-Mg and Al-Cu systems / E.V. Chirkov // Aviation Mater. Technologies. 2013. №2. Р.11–19.
  4. Lyakishev, N.P. Diagrams of the state of doublemetal systems / N.P. Lyakishev – M. : Mashinostroenie, 1996. V.1. 991 p.
  5. Ostermann, F. Technology of aluminum application / F. Ostermann – M. : NP APRAL, 2019. 842 p.
  6. Afanasyev, V.K. Thermal expansion of Al-Cu alloys after melt treatment and heat treatment / V.K. Afanasyev, M.A. Malyukh, M.V. Popova, V.A. Leys, S.V. Dolgova // Metalworking : technology, equipment, tools. 2016. №2. Р.87–94.
  7. Kidyarov, B.I. The mechanism of the nano-stage of crystal formation from the liquid phase / B.I. Kidyarov // Interuniversity collection of scientific papers. 2014. №6. P.155–161.
  8. Brodova, I.G. Melts as the basis for the formation of the structure and properties of aluminum alloys / I.G. Brodova, P.S. Popel, N.M. Barbin, N.A. Vatolin. – Yekaterinburg : Ural Branch of the Russian Academy of Sciences, 2005. 369 p.
  9. Baum, B.A. Liquid steel / B.A. Baum, G.A. Khasin, G.V. Tyagunov. – M. : Metallurgiya, 1984. 206 p.
  10. Manov, V. Effect of melt temperature on the electrical resistivity and crystallization temperature of Al91La5Ni4 and Al91La5Ni4 amorphous alloys / V. Manov, А. Rubstein, A. Voronel, P. Popel, A. Vereshagin // Mater. Sci. Eng. : A. 1994. V.179–180. P.91–96.
  11. Inoue, I. Amorphous, nanoquasicrystalline and nanocrystalline alloys in Al-based / I. Inoue // Progr. Mater. Sci. 1998. V.43. P.365–520.
  12. Menshikova, S.G. Influence of high pressures on the formation of new phase in the Al86Ni2Co6Gd6 alloy / S.G. Menshikova, V.V. Brazhkin // Physics of the Solid State. 2022. V.64. Is.2. P.197–203.
  13. Baykin, D.N. The effect of vibration on a solidifying melt in a casting mold / D.N. Baykin. – Penza : Penza State University, 2019. 51 р.
  14. Makarov, A.S. Glass-forming ability of melts / A.S. Makarov, E.O. Manakova, R.A. Konchakov, G.V. Afonin, V.A. Khonik. – Voronezh : Voronezh State Pedagogical University, 2021. 40 p.
  15. Fayzibaev, Sh.S. Heat treatment and investigation of the characteristics of materials of the Al-B-N system for creating composite materials / Sh.S. Fayzibaev, O.V. Ignotenko, T.T. Urazbaev, Sh.I. Mamaev, Zh.Kh. Nafasov // Universum: technical sciences. 2023. Is.11. P.30–34.
  16. Menshikova, S.G. Investigation of the effect of high pressures on the solidification of a liquid alloy Al86Ni6Co4Gd2Tb2 / S.G. Menshikova, V.V. Brazhkin, A.S. Danilova // Chemical physics and mesoscopy. 2021. V.23. Is.4. Р.478–485.
  17. Aptekar, I.L. Analysis of possible types of diagrams of the state of two-component systems and evolution under pressure / I.L. Aptekar, L.G. Isaeva // Physics and technology of high pressures. 1983. Is.12. Р.31–53.
  18. Golubev, S.V. The state of REM in melts with aluminum / S.V. Golubev, V.I. Kononenko // Melts. 1988. V.2. Is.5. Р.35–40.
  19. Chugunov, D.B. Features of the formation of a quasi-crystalline phase in cast alloys of the Al-Cu-Fe system / D.B. Chugunov, A.K. Osipov, K.B. Kalmykov, L.L. Meshkov // Bull. Moscow University. Ser.2. Chemistry. 2015. V.566. Is.2. Р.98–105.
  20. Khvostantsev, L.G. Toroid tipe high-pressure device : history and prospects / L.G. Khvostantsev, V.N. Slesarev, V.V. Brazhkin // High Pressure Research. 2004. V.24. №3. Р.371–383.
  21. GOST 2999–75. Metals and alloys. Vickers hardness measurement methods. – M. : Publishing House of Standards, 1987. 30 p.
  22. Taran, U.N. Structure of eutectic alloys / U.N. Taran, V.N. Mazur. – M. : Metallurgy, 1978. 312 p.
  23. Efimov, V.A. Modeling of the processes of forming the crystal structure of injection molding / V.A. Efimov, A.S. Eldarkhanov, A.S. Nuradinov // Steel. 2003. Is.6. P.39–41.
  24. Lipchin, T.N. Structure and properties of non-ferrous alloys, hardening under pressure / T.N. Lipchin. – M. : Metallurgy, 1994. 128 р.

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