Alloys of the AI -Mg system are characterized by an elevated corrosion resistance and ductility and good casting properties. The strength of these alloys depends considerably on the concentration of the main alloying element, namely, magnesium. Alloying with small amounts of transition metals, for example, Ti, Zr, Cr, Sc, affects markedly the structure and properties of AI -Mg alloys. The present work is devoted to the structure and properties ofAl -Mg alloys alloyed with scandium.Mechanical properties of hardened alloys of the AI-Mg system alloyed with Sc, Ti, Mn, Cr, and Be are presented in Table I. It can be seen that the highest strengthening is attained when the magnesium concentration in the alloy is 8%. The effect of the concentration of scandium on the mechanical properties of the AI -8% Mg alloy is presented in Fig. 1.
Messungen der Gitterparameter und der elektrischen Eigenschaften an GaAs‐ Mischkristallen mit Se in Abhängigkeit von der Se‐Konzentration ergeben, daß sich der Hauptanteil der Se‐Atome auf Zwischengitterplätzen in der Nähe von Eindringungs‐Stapelfehlem befindet.
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