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Matrix grain refinement in Al-TiAl composites by severe plastic deformation: influence of particle size and processing route

AuthorsMuñoz Morris, Mª Antonia; Calderón, N.; Gutierrez-Urrutia, I.; Morris, David G.
KeywordsEqual channel angular pressing
Grain refinement
Metal-intermetallic composites
Mechanical strength
Issue Date2006
CitationMaterials Science and Engineering A 425 (1-2) : 131-137 (2006)
AbstractThe microstructure and mechanical behaviour of Al-based composites reinforced with TiAl intermetallic particles has been examined in the as-extruded state and after processing by equal channel angular pressing (ECAP). The latter produces a grain size reduction in the aluminium matrix to values of 500 nm, using route A, and 750 nm, using route C. The ECAP produces up to a 75% increase in the yield stress of the composites, being more rapid when route A is used. The strengthening effect by ECAP is much larger than that obtained by increasing the volume fraction of reinforcement particles from 25 to 50% in these composites
Publisher version (URL)http://dx.doi.org/10.1016/j.msea.2006.03.027
Appears in Collections:(CENIM) Artículos
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