Recent progress in the development of gamma titanium aluminide alloys

Citation
F. Appel et al., Recent progress in the development of gamma titanium aluminide alloys, ADV ENG MAT, 2(11), 2000, pp. 699-720
Citations number
86
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Material Science & Engineering
Journal title
ADVANCED ENGINEERING MATERIALS
ISSN journal
1438-1656 → ACNP
Volume
2
Issue
11
Year of publication
2000
Pages
699 - 720
Database
ISI
SICI code
1438-1656(200011)2:11<699:RPITDO>2.0.ZU;2-D
Abstract
Intermetallic titanium aluminides offer an attractive combination of low de nsity and good oxidation and ignition resistance with unique mechanical cal properties. These involve high strength and elastic stiffness with excelle nt high temperature retention. Thus, they are one of the few classes of eme rging materials that have the potential to be used in demanding high-temper ature structural applications whenever specific strength and stiffness are of major concern. However, in order to effectively replace the heavier nick el-base superalloys currently in use, titanium aluminides must combine a wi de range of mechanical property capabilities. Advanced alloy designs are ta ilored for strength, toughness, creep resistance, and environmental stabili ty. These concerns are addressed in the present paper through global commen tary on the physical metallurgy and associated processing technologies of g amma -TiAl-base alloys. Particular emphasis is paid on recent developments of TiAl alloys with enhanced high-temperature capability.