The aim of the present study is to develop an understanding of new Aluminium alloys with a nano-scale microstructure obtained by rapid solidification and heat treatments. Such alloys are of particular interest for their high strenght, good ductility, high stiffness and reasonable temperature stability for applications in the transport and power generation industries (turbo and screw compressors, aircraft wheels, pistons, etc.) and in the electronics industry (high temperature interconnectors). Such materials are strengthened by the very fine scale of the microstructure and by the nature of the majority intermetallic phases. The distribution of the different amorphous and intermetallic phases can determine the strength and ductility of the material and a complete understanding of such relationships is needed to optimize the microstructures and alloy compositions for specific applications. The present study will examine the relationships between phase distribution obtained by thermal treatments and the mechanical properties of selected alloys as a function of the amorphous to crystalline ratio, and the size and distribution of each of the phases. One subproject will prepare rapidly solidified ribbon samples and examine variations of phase mixtures with heat treatments. The other subproject will quantify phase microstructures and determine mechanical properties and the mechanisms responsible. As a result of these studies we expect to achieve an optimum alloy microstructure for best properties and an attempt will be made to prepare this best alloy in bulk form by powder atomisation and consolidation. These results will be discussed with the aluminium producing industries as well as with potential users.
|Effective start/end date||28/12/00 → 27/12/03|
- The Spanish National Research Council (CSIC)
- Universitat Autònoma de Barcelona (UAB) (lead)
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