Technological Aspects of Thin Plate Production for Aircraft Construction Based on Al–Mg–Sc Alloys

• Published in: Inorganic materials : applied research 2021-03, Vol.12 (2), p.288-295
• Main Authors: Eremeev, N. V., Predko, P. Yu, Eremeev, V. V., Bespalov, A. V., Bochvar, S. G.
• Format: Article
• Language: English
• Subjects: Alloys; Aluminum base alloys; Chemistry; Chemistry and Materials Science; Corrosion resistance; Crack propagation; Elongated structure; Extrusion; Grain sub boundaries; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Magnesium base alloys; Materials of Aircraft and Aerospace Engineering; Materials Science; Scandium; Ternary systems; Thin plates; Transition metals
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S2075113321020131

The possibility of replacing thin plates (0.5 mm) of AA2024 grade alloy by plates made of a novel alloy of the Al–Mg–Sc system doped with transition metals is studied. The novel material is lighter than AA2024 alloy while retaining such properties as a high level of corrosion resistance and satisfactory weldability, equaling the aforementioned alloy in static strength, ductility, and crack resistance. It is shown that, upon using extrusion through the matrix with a periodically changing profile, the accumulated strain factor exhibits an almost twofold increase in comparison with the extrusion through a cone matrix. This makes it possible to improve the refinement of the structure at the same elongation ratio amounting to 4. It has been shown that a mixed structure with small-angle dislocation subgrain boundaries and strongly disoriented boundaries of fragmented structures is formed within the plates with a thickness of 0.5 mm.