Abstract
Alloys of Al-2.2%Cu-1.5%Mg with equal amounts of Fe and Ni addition up to 7% each were argon gas-atomized to fine powders, and continuously extruded by a Conform machine. The extrudates showed superior strength, heat resistance and high modulus of elasticity and also exhibited low thermal expansion coefficients and good wear resistance. The extrudates from rapidly solidified alloy powders were dispersion hardened by fine dispersoids of Al9FeNi and age hardened by Al-Cu-Mg precipitates. High volume fraction of Al9FeNi phase also caused high modulus, low thermal expansion and good wear resistance.
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