PHASE-EQUILIBRIA INVOLVING THE TAU-L1(2) AND TIAL2 PHASES IN THE TI-AL-CR SYSTEM

Citation
Tj. Jewett et al., PHASE-EQUILIBRIA INVOLVING THE TAU-L1(2) AND TIAL2 PHASES IN THE TI-AL-CR SYSTEM, Intermetallics, 4(7), 1996, pp. 543-556
Citations number
32
Categorie Soggetti
Metallurgy & Metallurigical Engineering","Chemistry Physical","Material Science
Journal title
ISSN journal
09669795
Volume
4
Issue
7
Year of publication
1996
Pages
543 - 556
Database
ISI
SICI code
0966-9795(1996)4:7<543:PITTAT>2.0.ZU;2-J
Abstract
An investigation into the phase equilibria of the Al-rich portion of t he Ti-Al-Cr ternary system was carried out using both bulk alloy and d iffusion couple samples. Combination of the data from the samples enab led the construction of partial isothermal sections at 1000 and 800 de grees C. Further, the Ti(Cr,Al)(2) + tau --> beta(Cr) + TiAl2 invarian t reaction was found to occur between 1000 and 800 degrees C. In addit ion to the above reaction a precursor invariant reaction, TiAl + tau - -> Ti(Cr,Al)(2) + TiAl2, also occurs between those temperatures. Due t o the recession of the beta(Cr) phase with decreasing temperature and the formation of the Cr2Al phase, the beta(Cr) + tau --> Cr2Al + Al8Cr 5 invariant reaction was observed at about 890 degrees C. Copyright (C ) 1996 Elsevier Science Limited.