Microstructural Features of Extrudatesi Prepared from Rapidly Solidified Al–Fe–Ni–Co Powder

Abstract

The microstructure of engineering material prepared from rapidly solidified atomized powder has been investigated. The material was prepared by cold compaction, heating to deformation temperature, and extrusion into rod. The structure was found to be inhomogeneous, and six types of microstructures have been identified. It is concluded that most of these structures have their origin in the metal powders and therefore that attention should be given to the atomization process. Structure resulting from solid state transformations was also identified, indicating that the thermomechanical working process must also be important in the preparation of materials from the powder phase. PM/0321