Warm Deformation of Alloy Al – 4.7% Mg – 0.32% Mn – 0.21% Sc – 0.09% Zr

• Published in: Metal science and heat treatment 2019-11, Vol.61 (7-8), p.416-420
• Main Authors: Pozdnyakov, A. V., Barkov, R. Yu, Yakovtseva, O. A., Levchenko, V. S., Prosviryakov, A. S., Zolotorevskii, V. S.
• Format: Article
• Language: English
• Subjects: Alloys; Aluminum Alloys; Annealing; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Deformation; Ductility; Elongation; Engineering Thermodynamics; Grain boundaries; Heat and Mass Transfer; Magnesium; Manganese; Materials Science; Mechanical properties; Metallic Materials; Scandium; Sheets; Specialty metals industry; Warm rolling; Warm working; Zirconium
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/s11041-019-00439-6

The evolution of the structure and mechanical properties of sheets from alloy Al – 4.7% Mg – 0.32% Mn – 0.21% Sc – 0.09% Zr during warm rolling and subsequent annealing is studied. It is shown that extended fibers with a thickness of 50 – 100 nm form inside the deformed grains in the rolling process. Post-rolling annealing of the sheets at 150 and 200°C results in substantial lowering of the elongation after a hold for 3 h; then the ductility recovers after a hold for 5 h. The lowering of the ductility is associated with precipitation of a fine β -phase over grain boundaries during the annealing. The phase grows and its volume fraction decreases when the annealing time is prolonged. The possibility of formation of high-level mechanical properties after warm rolling and subsequent annealing is shown.