THE ROLE OF CR IN PROMOTING PROTECTIVE ALUMINA SCALE FORMATION BY GAMMA-BASED TI-AL-CR ALLOYS .2. OXIDATION BEHAVIOR IN AIR

Authors
BRADY MP SMIALEK JL HUMPHREY DL SMITH J
Citation
Mp. Brady et al., THE ROLE OF CR IN PROMOTING PROTECTIVE ALUMINA SCALE FORMATION BY GAMMA-BASED TI-AL-CR ALLOYS .2. OXIDATION BEHAVIOR IN AIR, Acta materialia, 45(6), 1997, pp. 2371-2382
Citations number
19
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Acta materialia → ACNP
ISSN journal
13596454
Volume
45
Issue
6
Year of publication
1997
Pages
2371 - 2382
Database
ISI
SICI code
1359-6454(1997)45:6<2371:TROCIP>2.0.ZU;2-S
Abstract
The oxidation behavior of single-phase gamma, single-phase Laves, and two-phase gamma + Laves Ti-Al-Cr alloys was investigated at 1000 degre es C in air. The addition of 4-5 at.% Cr to the gamma phase resulted i n protective alumina scale formation in dry air, but titania-based nod ule formation in humid room air. Two-phase gamma + Laves alloys exhibi ted protective alumina scale formation in both dry air and humid room air. The difference in oxidation behavior between gamma and gamma + La ves alloys was interpreted in terms of compositional changes at the al loy/scale interface during oxidation. (C) 1997 Acta Metallurgica Inc.