Browsing by Author "Poutier, M. A."
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Item L'Al-TiB 2, un matériau pour les applications du secteur des transports nécessitant résistances aux températures élevées et à l'usure(2002-12) Goñi, J.; Egizabal, P.; Coleto, J.; Poutier, M. A.; Guridi, J. R.; Centros PRE-FUSION TECNALIA - (FORMER); Tecnalia Research & Innovation; MercadoThe transport industry is continuously seeking new light materials to comply with the low fuel consumption policies and enhanced technical requirements. The use of Metal Matrix Composites (MMCs) is seen as a feasible alternative to substitute several grey cast iron steel and non reinforced aluminium alloys components as they present outstanding specific properties, high wear resistance as well as low Coefficient of Thermal Expansion (CTE). The results obtained during a research project that studied the actual possibilities, processing optimisation and mechanical properties of an aluminium matrix composite reinforced with in-situ produced TiB 2 ceramic particles are presented. Railway and automotive components were produced by Gravity Casting, High Pressure Die Casting (HPDC) and a variant of the Sand Casting process called "Multipouring" and the melt behaviour and obtained mechanical properties were analysed and evaluated. The material presented a remarkable improvement of properties when compared with the corresponding non-reinforced alloys. Furthermore, the presence of the TiB 2 particles conferred a thixotropic nature to the melt whose positive effects during the filling step could also be noticed during the production of prototypes.Item Al-TiB2: Un materiau alternatif pour des applications resistant a l'usure et aux hautes temperatures dans l'industrie du transfert(2002-08) Goni, J.; Egizabal, P.; Coleto, J.; Poutier, M. A.; Guridi, J. R.; Centros PRE-FUSION TECNALIA - (FORMER); Tecnalia Research & Innovation; MercadoResults obtained in a study of real-life possibilities, process optimization and mechanical properties of aluminum metal matrix composites reinforced by particles of ceramic TiB2 are presented and discussed. Vehicle and train components have been made of those materials by gravity molding, high-pressure casting and the so-called Pultipouring process. The results have been analyzed and evaluated from the standpoint of casting and mechanical properties. Reinforcement resulted in a significant improvement and the presence of TiB2 made the alloy thixotropic, which had a positive effect on the process.