Abstract
The failure modes of particulate reinforced metallic alloys are reviewed with special emphasis on in situ intermetallic particle reinforced niobium alloys, but information derived from ceramic reinforced aluminum alloys is also included. Constraint of plastic deformation by particles is emphasized as one of two very important factors in controlling fracture behavior. The other factor is particle fracture toughness. Models are proposed for describing the fracture toughness, from which several methods of enhancing toughness are envisioned. This modeling of fracture toughness is intended to help optimize the design and processing of these materials for enhanced fracture resistance.
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