Paper number 1072
|AGE-HARDENING OF AN ALUMINIUM ALLOY MATRIX COMPOSITE REINFORCED WITH STAINLESS STEEL FIBRES|
C. Salmon1, F.X. Gustin1, C.Colin2, F.Delannay1
1Université catholique de Louvain, Département de sciences des matériaux et des procédés, PCIM, Place Sainte Barbe 2, B-1348, Louvain-la-Neuve, Belgium
2Ecole nationale supérieure des mines de Paris, Centre des matériaux P-M Fourt, BP87, F-91003 Evry cedex, France
|Summary||The possibility of reinforcing the age-hardenable aluminium alloy AS9G03 by stainless steel fibres is explored. A first part of the work concerns the composite processing by squeeze casting. Several processing parameters had to be controled in order to obtain a sound material with optimised microstructure. In a second part, the age-hardening of the composite is considered. The oxide layer on the fibres which was designed to prevent the fibre/matrix reaction during the heat-treatment is showed to strongly affect age-hardening due to the diffusion of Mg towards the oxidic fibre/matrix interface. The paper shows how precipitation hardening can be ensured in the composite by adjustment of solution treatment temperature and time and oxide layer thickness.
||Keywords|| precipitation hardening, CMM, stainless steel fibres.
Theme : Metal Matrix Composites
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