NEWS OF THE HIGHER EDUCATIONAL INSTITUTES, NON-FERROUS METALLURGY (SELECTED ARTICLES)
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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INFLUENCE OF ALUMINUM OXIDE ON SOME PROPERTIES OF ALUMINUM ALLOYS The action of Al oxides on the settlement, hardness, and specific gravity of Al alloys with Si was determined. The specific gravity decreased from 2.64 to 2.5 when alloys were polluted with 5.8 oxides. The Brinnell hardness was higher in samples with oxides than in those without oxides. At an even loading, samples with oxides had a smaller settlement than samples without oxides. EXPERIMENT ON HEAT RESISTANCE OF CERTAIN STRAINED ALUMINUM ALLOYS A study was made of mechanical properties at high temperatures of some strained Al alloys containing large quantities of Mn and Ni. The strongest alloys were those of the type Al-Cu-Mg, with admixtures of Mn. The most heat resistant Al alloy contained 5.5 Cu and small additions of Mn, Zr, and V. At high pressure 12 kgsq mm the preferred alloys consisted of Al-Cu-Mg with addition of Mn.