Recent Advances in Superplastic Intermetallics

Abstract

Abstract: Superplasticity in intermetallic alloys is reviewed. Intermetallics which have been demonstrated to be superplastic include nickel-based (Ni_3Al, Ni_3Si), titanium-base (Ti_3Al, TiAl), and iron-base (Fe_3Al, FeAl) alloys. These alloys are primarily finegrained, two phase materials. But, superplasticity was also observed in some iron-base alloys which were in coarsegrained conditions. These alloys behave like Class I solid solution. The superplastic deformation mechanisms as well as microstructural characteristics are discussed. The superplastic forming of intermetallics is also briefly addressed.

Key words: Superplasticity, microstructure, grain size, boundary sliding

NIEH Tai-Gang;WADSWORTH Jeffrey (Lawrence Livermore National Laboratory, Livermore, CA 94550, USA). Recent Advances in Superplastic Intermetallics[J]. Acta Metallurgica Sinica (English Letters), 1995, 8(z1): 405-417.

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