Microstructure and creep behavior of directionally solidified TiAl-base alloys

Citation
Dr. Johnson et al., Microstructure and creep behavior of directionally solidified TiAl-base alloys, INTERMETALL, 9(10-11), 2001, pp. 923-927
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
INTERMETALLICS
ISSN journal
0966-9795 → ACNP
Volume
9
Issue
10-11
Year of publication
2001
Pages
923 - 927
Database
ISI
SICI code
0966-9795(200110/11)9:10-11<923:MACBOD>2.0.ZU;2-9
Abstract
Tensile creep tests were conducted on directionally solidified TiAl alloys to discern the effect of alloying and lamellar orientation. A seeding techn ique was used to align the TiAl/Ti3Al lamellar structure parallel to the gr owth direction for alloys of Ti-47Al, Ti-46Al-0.5Si-0.5X (X = Re, W, Mo. an d Cr), and Ti-46Al-1.5Mo-0.2C (at.%). Tensile creep tests were performed at 750 degreesC using applied stresses of 210 and 240 MPa. Aligning the lamel lar microstructure greatly enhances the creep resistance which can further be improved by additional alloying. (C) 2001 Elsevier Science Ltd. All righ ts reserved.