The effect of impurities on the phase composition and the properties of a new quasibinary Al–Cu–Gd alloy have been investigated. The microstructure in the cast alloy consists of an aluminum solid solution, a dispersed eutectic with the Al8Cu4Gd phase with approximately 1% iron impurity dissolved, and an (AlGdCuSi) phase with an approximate composition of Al80Gd5Cu8Si5. High-temperature homogenization at 600°С results in the fragmentation and spheroidization of the solidification-induced phases, including the silicon-containing phase. The annealing of cold-worked sheets at temperatures up to 250°C results in roughly the same softening associated with the recovery and polygonization processes in alloys with and without impurities. The structure is completely recrystallized after 1-hour annealing at 300°C and has an average grain size of 7.5 μm, which slightly increases to 11 μm after annealing at 550°C. The yield strength of the alloys rolled and annealed at 100–150°С is 227–276 MPa with elongation of 5%. Iron and silicon impurities have no negative effects on the microstructure and mechanical properties of this new alloy.
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V. S. Zolotorevsky, N. A. Belov, and M. V. Glazoff, Casting Aluminum Alloys (Alcoa Technical Center, 2007).
ASM HANDBOOK. Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (The Materials Information Company, 2010), Vol. 2.
N. A. Belov, A. V. Khvan, and A. N. Alabin, “Microstructure and phase composition of Al–Ce–Cu alloys in the Al-rich corner,” Mater. Sci. Forum 519–521, 395–400 (2006).
N. A. Belov and A. V. Khvan, “The ternary Al–Ce–Cu phase diagram in the aluminum-rich corner,” Acta Mater. 55, 5473–5482 (2007).
A. V. Pozdniakov and R. Y. Barkov, “Microstructure and materials characterisation of the novel Al–Cu–Y alloy,” Mater. Sci. Technol. 34, 1489–1496 (2018).
S. M. Amer, R. Yu. Barkov, O. A. Yakovtseva, and A. V. Pozdniakov, “Comparative analysis of structure and properties of quasi-binary Al–6.5Cu–2.3Y and Al–6Cu–4.05Er alloys,” Phys. Met. Metallogr. 121, 528–534 (2020).
A. V. Pozdniakov, R. Yu. Barkov, S. M. Amer, V. S. Levchenko, A. D. Kotov, and A. V. Mikhaylovskaya, “Microstructure, mechanical properties and superplasticity of the Al–Cu–Y–Zr alloy,” Mater. Sci. Eng., A 758, 28–35 (2019).
S. M. Amer, R. Yu. Barkov, and A. V. Pozdniakov, “Effect of Mn on the phase composition and properties of Al–Cu–Y–Zr alloy,” Phys. Met. Metallogr. 121, 1227–1232 (2020).
S. M. Amer, R. Y. Barkov, A. S. Prosviryakov, and A. V. Pozdniakov, “Structure and properties of new heat-resistant cast alloys based on the Al–Cu–Y and Al–Cu–Er systems,” Phys. Met. Metallogr. 122, 908–914 (2021).
S. M. Amer, R. Y. Barkov, A. S. Prosviryakov, and A. V. Pozdniakov, “Structure and properties of new wrought Al–Cu–Y and Al–Cu–Er based alloys,” Phys. Met. Metallogr. 122, 915–922 (2021).
A. V. Pozdnyakov, R. Yu. Barkov, Zh. Sarsenbaev, S. M. Amer, A. S. Prosviryakov, “Evolution of microstructure and mechanical properties of a new Al–Cu–Er wrought alloy,” Phys. Met. Metallogr. 120, 614–619 (2019).
S. M. Amer, R. Yu. Barkov, O. A. Yakovtseva, I. S. Loginova, and A. V. Pozdniakov, “Effect of Zr on microstructure and mechanical properties of the Al–Cu–Er alloy,” Mater. Sci. Technol. 36, 453–459 (2020).
S. M. Amer, A. V. Mikhaylovskaya, R. Yu. Barkov, A. D. Kotov, A. G. Mochugovskiy, O. A. Yakovtseva, M. V. Glavatskikh, I. S. Loginova, S. V. Medvedeva, and A. V. Pozdniakov, “Effect of homogenization treatment regime on microstructure, recrystallization behavior, mechanical properties, and superplasticity of Al–Cu–Er–Zr alloy,” JOM 73, 3092–3101 (2021).
S. Amer, O. Yakovtseva, I. Loginova, S. Medvedeva, Al. Prosviryakov, A. Bazlov, R. Barkov, and A. Pozdniakov, “The phase composition and mechanical properties of the novel precipitation-strengthening Al–Cu–Er–Mn–Zr alloy,” Appl. Sci. 10, 5345 (2020).
S. Amer, R. Barkov, and A. Pozdniakov, “Microstructure and mechanical properties of novel quasibinary Al–Cu–Yb and Al–Cu–Gd alloys,” Metals 11, 476 (2021).
S. M. Amer, R. Yu. Barkov, and A. V. Pozdniakov, “Effect of iron and silicon impurities on phase composition and mechanical properties of Al–6.3Cu–3.2Y alloy,” Phys. Met. Metallogr. 121, 1002–1007 (2020).
S. M. Amer, R. Yu. Barkov, and A. V. Pozdniakov, “Effect of impurities on the phase composition and properties of a wrought Al–6% Cu–4.05% Er alloy,” Phys. Met. Metallogr. 121, 495–499 (2020).
N. Q. Vo, D. C. Dunand, and D. N. Seidman, “Improving aging and creep resistance in a dilute Al–Sc alloy by microalloying with Si, Zr and Er,” Acta Mater. 63, 73–85 (2014).
A. De Luca, D. C. Dunand, and D. N. Seidman, “Mechanical properties and optimization of the aging of a dilute Al–Sc–Er–Zr–Si alloy with a high Zr/Sc ratio,” Acta Mater. 119, 35–42 (2016).
C. Booth-Morrison, D. N. Seidman, and D. C. Dunand, “Effect of Er additions on ambient and high-temperature strength of precipitation-strengthened Al–Zr–Sc–Si alloys,” Acta Mater. 60, 3643–3654 (2012).
A. V. Pozdniakov, A. A. Aytmagambetov, S. V. Makhov, and V. I. Napalkov, “Effect of impurities of Fe and Si on the structure and strengthening upon annealing of the Al–0.2% Zr–0.1% Sc alloys with and without Y additive,” Phys. Met. Metallogr. 118, 479–484 (2017).
A. V. Pozdnyakov and R. Yu. Barkov, “Effect of impurities on the phase composition and properties of a new alloy of the Al–Y–Er–Zr–Sc system,” Metallurgist 63, 79–86 (2019).
R. A. Karnesky, M. E. van Dalen, D. C. Dunand, and D. N. Seidman, “Effects of substituting rare-earth elements for scandium in a precipitation-strengthened Al–0.08 at % Sc alloy,” Scr. Mater. 55, 437–440 (2006).
M. E. Van Dalen, D. C. Dunand, and D. N. Seidman, “Nanoscale precipitation and mechanical properties of Al–0.06 at % Sc alloys microalloyed with Yb or Gd,” J. Mater. Sci. 41, 7814–7823 (2006).
M. E. Van Dalen, D. C. Dunand, and D. N. Seidman, “Microstructural evolution and creep properties of precipitation-strengthened Al–0.06Sc–0.02Gd and Al–0.06Sc–0.02Yb (at %) alloys,” Acta Mater. 59, 5224–5237 (2011).
G. Cacciamani, S. De Negri, A. Saccone, and R. Ferro, “The Al–R–Mg (R = Gd, Dy, Ho) systems. Part I: experimental investigation,” Intermetallics 11, 1125–113 (2003).
The authors thank the members of the scientific school NSh-1752.2022.4 for discussing the results.
This work was supported by the Russian Scientific Foundation (project no. 21-79-00193).
The authors declare that they have no conflicts of interest.
Translated by T. Gapontseva
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Barkov, M.V., Mamzurina, O.I., Glavatskikh, M.V. et al. The Effects of Impurities on the Phase Composition and the Properties of the Al–Cu–Gd Alloy. Phys. Metals Metallogr. 123, 604–608 (2022). https://doi.org/10.1134/S0031918X22060035
- aluminum alloys
- phase composition