Acta Metallurgica Sinica (English Letters) ›› 1995, Vol. 8 ›› Issue (z1): 405-417.

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Recent Advances in Superplastic Intermetallics

NIEH Tai-Gang;WADSWORTH Jeffrey (Lawrence Livermore National Laboratory, Livermore, CA 94550, USA)   

  • 出版日期:1995-10-10 发布日期:2009-10-10

Recent Advances in Superplastic Intermetallics

NIEH Tai-Gang;WADSWORTH Jeffrey (Lawrence Livermore National Laboratory, Livermore, CA 94550, USA)   

  • Online:1995-10-10 Published:2009-10-10

摘要: RecentAdvancesinSuperplasticIntermetallicsNIEHTai-Gang;WADSWORTHJeffrey(LawrenceLivermoreNationalLaboratory,Livermore,CA94550,USA)Abstract:Superplasticityinintermetallicalloysisreviewed.Intermetallicswhichhavebeendemonstratedtobesuperplasticincludenickel-based(Ni_3Al,Ni_3Si),titanium-base(Ti_3Al,TiAl),andiron-base(Fe_3Al,FeAl)alloys.Thesealloysareprimarilyfinegrained,twophasematerials.But,sup....

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