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Contenido archivado el 2024-06-10

Development of elevated temperature aluminium alloys

Objetivo



BE95-1151 Development of Elevated Temperature Aluminium Alloys
It is proposed to achieve the industrial scale development of a low cost process of fabrication of a light material, based on the aluminium system (density of 3000 kg/m3), suitable for applications at 250 to 300øC.
In case of success the developed products correspond to a potential market of at least 100 tons per year for applications, like the hot air conditioning tubes and the de-icing systems of the nacelles and of the leading edges of all European subsonic civil aircraft where the substitution of pure titanium by the new aluminium alloys could bring a weight saving of 20 to 40%, that is between 100 and 200 kg per aircraft, depending on its size. The main technical problem arising in the design of such a material comes from the necessity to marry two requirements which seem to be inconsistent: the alloy must be stable at 300øC, which means that it must keep high mechanical properties up to 300øC, but at the same time the alloy must be processable in conventional equipments, such as extrusions presses, with limited pressures. which means that the alloy must soften sufficiently at the temperature of working, that is 460 to 500øC. without any modification of its microstructure. So the developed process, defined by the following steps:

- alloy composition,
- atomization of powders,
- cold and hot consolidation,
- hot working,
- final in house manufacturing technologies,

will have to produce a material with high mechanical properties and good creep and fatigue resistance up to 300øC that can be processed with conventional equipments without damaging of its microstructure that might be detrimental to its performance, so as to fabricate large parts at a cost acceptable for the foreseen applications, that is inferior to 25 ECU/kg

The research will be achieved by completion of the following tasks: - Optimisation of the consolidation / extrusion process of Al-6Fe-V P/M alloys
- Investigation of mechanical alloying and ceramic particle reinforcement on a dilute version of the A1Fe-V alloy
- Evaluation of thermal stability and creep properties of the different products and selection of one process
- Fabrication of large extruded and rolled products in the selected alloy/process
- Full characterization of the sheets and extrusions and study of the influence of in-house manufacturing processes on the final properties - Total process analysis - definition of guidelines for a global process optimized in regard to cost and performance of the product
- Evaluation of the project: final technical and economical analysis - indications for further developments

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Coordinador

AEROSPATIALE MATRA SA
Aportación de la UE
Sin datos
Dirección
Rue Pasteur
92152 Suresnes
Francia

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Participantes (9)

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