High Strength Powder Metallurgy Aluminum Alloys PDF Download

The historic development of aluminum powder metallurgy dates back to the early 1900's with initial flake powder production and has matured to the present day production of viable aerospace alloys. Primary powder production and processing techniques, such as atomization and mechanical alloying are reviewed. Processing-microstructure-property relationships in four classes of high performance powder metallurgy (P/M) aluminum alloys are considered. These are (Aluminum-Iron-Cobalt, Aluminum-Iron-Nickel) high strength alloys (Aluminum-Zinc-Magnesium, copper-cobalt); high specific modulus alloys (Aluminum-Lithium-Copper); high temperature alloys (Aluminium-Iron-Cobalt, Aluminum-Iron-Nickel); mechanically alloyed material (Aluminum-Magnesium) and composite alloys. Direct property comparisons with counterpart ingot metallurgy alloys are presented where ever appropriate. Aluminum powder metallurgy alloy development is now at a mature stage of growth where commercial and aerospace application are being sought and developed in competition with traditional aluminum ingot metallurgy, titanium and composite structures. The future growth and development of these alloy systems is vested in reliable economic processing. Keywords: Alloys, High performance powder metallurgy, Production techniques, Microstructures, Processing. (JG).