Abstract
The paper provides the results of experimental studies of the microstructure, mechanical properties, and corrosion resistance of cast and submicrocrystalline (SMC) aluminum alloys Al-2.5Mg-Sc-Zr with different ratios of scandium and zirconium (Sc + Zr = 0.32 wt.%). SMC structure in alloys was formed by methods of severe plastic deformation: equal-channel angular pressing and rotary swaging. In our paper, we demonstrate that the alloys have high thermal stability – the recrystallization point in SMC alloys is 250-275 °C. We prove that the replacing scandium with zirconium leads to an increase in the thermal stability of the solid solution of scandium in cast and SMC aluminum alloys Al-Mg-Sc-Zr.
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