Abstract
The phase composition and properties of Al-Mg-Ce and Al-Mg-Y alloys are studied by optical microscopy and mechanical-property measurements. Isothermal sections at 430 and 275°C that correspond to alloys having manganese concentrations of up to 16% and cerium and yttrium concentrations of up to 0.7% are constructed. The ultimate strength, yield strength, and relative elongation of quenched, worked, and aged Al-Mg-based alloys having 7.0–9.9% Mg and Ce, Y, Mn, and Zr additions are determined. The alloys are aged at 175, 200, 250, and 300°C; the time of aging corresponds to the maximum strengthening effect.
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