Abstract
ABSTRACTRecent advances in superplasticity of L12 intermetallic alloys are reviewed. Results show that superplastic elongations of over 500% can be obtained in this group of materials. These intermetallic alloys include nickel silicide, Ni3 Si, and nickel aluminide, Ni3Al. In this review, the superplastic properties of these alloys are presented. The microstructural characteristics, e.g., grain size, phases, and texture, are described and correlated to the superplastic properties. The effects of alloying additions, temperature, and strain rate on the superplastic properties of these materials are discussed. In addition, the superplastic deformation mechanisms are proposed. Comparison of the superplastic characteristics of the intermetallic alloys are made with metal alloys and ceramic materials.
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