The extrusion of particle reinforced metal matrix composites is reviewed. The review addresses three areas: pre-extrusion processing, extrusion proper, and post-extrusion properties. Throughout the review, the links between these areas are emphasised. Billet production is briefly examined. Limits to the extrusion of PRMMCs are discussed, including stick-slip tearing. Extrusion methods used in the processing of PRMMCs are noted. Changes in the particle distribution during extrusion are discussed, as is the influence of the particles on void formation, and recrystallisation. The final section unites the previous two by looking at their influence on material properties. The critical issues in the extrusion of PRMMCs are identified as (i) the stick-slip tearing phenomenon; (ii) particle fracture; (iii) homogeneity of the particle distribution; (iv) void formation; (v) recrystallisation.
|Number of pages||12|
|Journal||Key Engineering Materials|
|Issue number||Pt 1|
|Publication status||Published - 1 Jan 1995|