Abstract
Abstract Mechanical properties of the Ni3Al intermetallic alloy could be improved by fine ductile precipitates. Four hypostoichiometric Ni3 (Al, Si) intermetallic alloys were prepared by levitation melting. The chemical compositions were chosen as close as possible to the assumed phase boundary between the γ′ and binary (γ + γ′) domains. Conditions for the precipitation of fine ductile γ particles in the γ′ intermetallic phase were established in preparation for further studies of mechanical and dislocation behaviours in this kind of microstructure.
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