Abstract: The invention relates to an improved method of removing gaseous or volatile contaminants from metal powders or porous compacts thereof wherein the powder or compact is subjected to a procedure comprising vacuum treatment, back filling with an innocuous depurative gas and another vacuum treatment to remove gaseous contaminants and depurative gas. The evacuation and back filling steps are usually repeated several times. Preferably, the depurative or wash gas is one which is capable of reacting with the metal powder or alloy constituents thereof to form a solid reaction product. After the gaseous and/or volatile contaminants are removed, the powder or compact is compressed to full density and then subjected to additional fabrication, if so desired.

Abstract: This invention is directed to an Al-Mg alloy product containing about 0.75-5% aluminide forming transition elements, such as iron, cobalt and nickel. After cold working, the alloy product readily recrystallizes at elevated temperatures to an average grain size less than 15 microns, usually 11 microns or less to provide high mechanical properties and a degree of superplasticity.

Abstract: This invention relates to a method of degassing prealloyed aluminum powder or compacts formed therefrom wherein the metal products are degassed by being subjected to a temperature between 450.degree. and 850.degree.F at a pressure less than 10.sup.-.sup.3 torr. The products of this process are characterized by high strength and fracture toughness and excellent corrosion resistance.