Data on superplastic behavior of intermetallic alloys with high ordering en
ergy, such as stoichiometric TiAl and Ti3Al and a number of alloys based on
TiAl, with submicron grain size are summarized. The small grain size resul
ted in a temperature range for superplasticity of 600-900 degreesC that is
200-400 degreesC lower than that for material with micron-sized grains. Thi
s paper reports on the effects of grain size, composition and superlattice
type on the low-temperature and high temperature superplastic properties of
titanium aluminides. Low temperature and high-temperature superplastic pro
perties of the titanium aluminides are compared. (C) 2001 Elsevier Science
B.V. All rights reserved.