Structure and properties of Al–Mg alloys depending on scandium and zirconium additions and production methods

• Published in: Powder metallurgy and metal ceramics 2010-12, Vol.49 (7-8), p.430-437
• Main Authors: Mil’man, Yu. V., Neikov, O. D., Sirko, A. I., Danilenko, N. I., Samelyuk, A. V., Zakharova, N. P., Sharovskii, A. I., Ivashchenko, R. K., Goncharuk, V. A., Chaikina, N. G.
• Format: Article
• Language: English
• Subjects: Alloys; Aluminum alloys; Aluminum base alloys; Cast alloys; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Glass; Materials Science; Mechanical properties; Metal products; Metallic Materials; Methods; Natural Materials; Powder metallurgy; Powders; Production management; Rare earth metals; Recrystallization; Scandium; Scandium base alloys; Specialty metals industry; Zirconium
• ISSN: 1068-1302; 1573-9066
• DOI: 10.1007/s11106-010-9254-0

The paper examines how scandium and zirconium doping of Al–Mg alloys produced by conventional casting and powder metallurgy methods influences their structure and mechanical properties. It is shown that Al–Mg powder alloys are not recrystallized in the plastic deformation process and subsequent heating to 550°C. In cast alloys, recrystallization begins even in the extrusion process. Additions of scandium, zirconium, and chromium restrain the recrystallization of alloys when heated to 550°C. Doping of Al–Mg alloys with scandium and zirconium increases their strength by 80−120%. Doped powder alloys have much greater strength than cast alloys and quite high plasticity.