Abstract

1. The highest solubility of molybdenum, tungsten, and niobium in aluminum with cooling from the liquid phase at rates of 103–104 deg/sec is 1.2%W, 0.6%Mo, and 0.75%Nb. 2. Anomalously supersaturated solid solutions of molybdenum, niobium, and tungsten in aluminum are extremely stable. They begin to decompose at 600–630° (Al with 0.75% Nb), 620–650° (Al with 0.62%Mo), and 650–670° (Al with 1.2%W). 3. Additions of tungsten, molybdenum, and niobium strengthen aluminum notably at room temperature and reduce the rate of softening at 350°.

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