Abstract: The present invention relates to aluminum-based alloy of Al—Cu—Mg—Li type and to an article made thereof which are intended to be used in aircraft and aerospace vehicles. While having high strength properties (ultimate strength level and yield strength level) the suggested alloy has a reduced sound conductivity upon acoustic influence. The invented alloy contains (mass. %): Li 1.7-2.0 Cu 1.6-2.0 Mg 0.7-1.1 Zr 0.04-0.2? Be 0.02-0.2? Ti 0.01-0.1? Ni 0.01-0.15 Mn 0.01-0.4? S 0.5 · 10?4-1.0 · 10?4 N 0.5 · 10?4-1.0 · 10?4 Co 0.5 · 10?6-1.0 · 10?6 Na 0.5 · 10?3-1.0 · 10?3 Al-balance Sheets of said alloy are particularly suited to be used as structural material for aircraft and aerospace vehicles in the form of skin and a primary sheets' set.

Abstract: This invention relates to the field of metallurgy, in particular to high strength weldable alloys with low density, of aluminium-copper-lithium system. These alloys can be used in air- and spacecraft engineering. The alloy comprises copper, lithium, zirconium, scandium, silicon, iron, beryllium, and at least one element from the group including magnesium, zinc, manganese, germanium, cerium, yttrium, titanium. A method for fabricating semiproducts is also provided.

Abstract: The invention relates to laminated hybrid alumopolymer materials comprising alternating sheets of aluminium alloys and layers of reinforced polymer composite material, such laminated materials are intended for use as structural sheet material for loaded parts of airframe (skins, partitions, stringers of fuselage and wings, floor panels, etc.) and for the repair thereof, and also for surface transport parts. There is suggested the composite laminated material comprising the alternating Al sheets and layers of glass fibre-reinforced plastic including the thermosetting binder and reinforcing filler, said composite material is characterized in that the aluminium sheets comprise at least two layers, one of which is made of high-modular Al—Li alloy of reduced density with Li content of more than 1.5%, and the other one is made of the alloy of Al—Mg—Si system, with layers' thicknesses ratio being (70-12):1.

Abstract: The present invention relates to aluminium-based alloy of Al—Cu—Mg—Li type and to an article made thereof which are intended to be used in aircraft and aerospace vehicles. While having high strength properties (ultimate strength level and yield strength level) the suggested alloy has a reduced sound conductivity upon acoustic influence. The invented alloy contains (mass. %): Li 1.7-2.0 Cu 1.6-2.0 Mg 0.7-1.1 Zr 0.04-0.2? Be 0.02-0.2? Ti 0.01-0.1? Ni 0.01-0.15 Mn 0.01-0.4? S 0.5 · 10?4-1.0 · 10?4 N 0.5 · 10?4-1.0 · 10?4 Co 0.5 · 10?6-1.0 · 10?6 Na 0.5 · 10?3-1.0 · 10?3 Al-balance Sheets of said alloy are particularly suited to be used as structural material for aircraft and aerospace vehicles in the form of skin and a primary sheets' set.