Abstract
Mechanical alloying is a unique high energy milling process for producing metal powders with a controlled microstructure. When applied to aluminum based alloys, a uniform, equiaxed fine dispersion of oxygen- and carbon-based particles is obtained. In addition, a very fine grain structure, pinned by the dispersoid, is generated. Relatively low volume loadings of dispersoid may be employed to achieve attractive combinations of properties including ambient temperature tensile strength, corrosion resistance and stress corrosion cracking resistance. The development of a dispersion strengthened aluminum-4 pct magnesium alloy is discussed.
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