Aging-Induced Hardening of Transition-Metal-Containing Al–Mg–Si Alloys Subjected to Deformation under Different Conditions
- 1 Downloads
Metallographic analysis, hardness and electrical resistivity measurements, and tensile tests are used to study the behavior of Al–Mg2Si alloys with (Sc + Zr) transition metal additions during aging performed after preliminary deformation under different conditions. It is shown that the decomposition of the supersaturated solid solution in the Al–Mg2Si alloys with (Sc + Zr) transition metals and without them occurs in the same manner. However, the strength properties of the alloys with transition metals are higher than those of the alloys free from the transition metals because of substantial refining of solid-solution grains and a high density of dispersoid (Sc1 –xZrx)Al3 aluminide particles. A peak hardness is observed for the alloys after quenching, equal channel angular pressing (ECAP), and aging. However, cold rolling after quenching before aging leads to an increase in the strength properties to a greater extent than ECAP performed under the same conditions.
Keywords:aluminum alloys cold rolling aging strength properties microstructure
This study was performed in terms of state assignment no. 007-00129-18-00.
- 1.G. Thomas, “The ageing characteristics of aluminum alloys,” J. Inst. Met. 90, 57–63 (1961–1962).Google Scholar
- 2.V. G. Davydov, V. I. Elagin, V. V. Zakharov, and T. D. Rostova, “On alloying of aluminum alloys with scandium and zirconium,” Metalloved. Term. Obrab. Met., No. 8, 25–30 (1996).Google Scholar
- 3.L. L. Rokhlin, N. R. Bochvar, N. Yu. Tabachkova, and A. V. Sukhanov, “Effect of scandium on the kinetics and hardening of Al–Mg2Si alloys,” Tekhnol. Legkikh Splavov, No. 2, 53–62 (2015).Google Scholar
- 7.M. Cabibbo, C. Scalabroooni, and E. Evangelista, “Effects of severe plastic deformation induced by equal-channel angular pressing in the AA1200, AA5754, AA6082 and AA6106 modified with Zr and Zr + Sc,” Met. Sci. Technol. 24 (1), 31–40 (2013).Google Scholar
- 10.T. V. Shchegoleva, “Aging mechanism of an Al–Mg–Si alloy,” Fiz. Met. Metalloved. 25 (2), 246–254 (1968).Google Scholar
- 11.M. E. Drits, L. B. Ber, Yu. G. Bykov, L. S. Toropova, and G. N. Anastas’eva, “Aging of the Al–0.3 at % Sc alloy,” Fiz. Met. Metalloved. 57 (6), 1172–1179 (1984).Google Scholar