Investigation of the Technology of Introducing Li, Mg and Zr Alloys into Aluminum Alloy

Abstract

This article is devoted to the study of the initial phase of obtaining alloy 1420, namely, obtaining a primary material with the desired chemical composition.  The effect of alloying magnesium, zirconium and lithium on the strength properties of the material.  In the work, the following materials were used to obtain a cast aluminum alloy of the Al-Mg-Zr-Li system: aluminum of technical purity A0 or A5, magnesium Mg95, lithium LE-1, zirconium E100, aluminum-zirconium ligature AlZr5, aluminum-lithium ligature AlLi10. Two methods were used to introduce zirconium into the liquid Al-Mg alloy: the introduction of pure zirconium and the introduction of zirconium in the form of a ligature. Two methods were used to introduce lithium into the Al-Mg-Zr liquid alloy: the introduction of lithium in the form of a ligature and the introduction of pure lithium.  Cast alloys of the Al-Mg-Zr-Li system with the following characteristics were obtained: chemical composition: Al-92.245%, Mg-5.00%, Zr-0.105%, Li-2.21%, Si-0.238%, impurities-0.202%. Mechanical properties: Brinell hardness 85 HB, microhardness 139 MPa, compressive strength 149.6 MPa, elastic modulus 12 GPa, compressive yield strength 175.2 MPa and plastic deformation modulus 0.83 GPa.