Investigation of the influence of alloying by Sc and by the number of transition metals as well as thermal treatment on the mechanical properties of 2618 alloys (Al—Cu—Mg system) at temperatures of 20 and 300 °С

Abstract

The influence of alloy 2618 alloying by Sc, Zr and by the number of transition metals with the aim of increasing the mechanical properties of extruded semi-finished products both at room temperature and at elevated temperatures was studied. It is shown that the increase of the mechanical properties of experimental alloys at room temperature is associated with a change in the morphology of the structural components due to alloying by the Sc + Zr complex, which leads to the formation of thy additional ensemble of nanosized reinforcing Al₃(Sc, Zr) particles. The increase of the high-temperature strength in these alloys is associated with alloying by Cr and V, which slow down the diffusion processes and increase the strength of the interatomic bonds in the crystal lattice Full text download