Protective Al2O3 scale formation on NbAl3-base alloys

1991 ◽  
Vol 36 (1-2) ◽  
pp. 113-141 ◽  
Author(s):  
J. Doychak ◽  
M. G. Hebsur
Keyword(s):  
Scale Formation ◽  
Al2o3 Scale

Promotion of the Al2O3-Scale Formation on Ni–Cr–Al Alloys via the Fluorine Effect

2015 ◽  
Vol 83 (3-4) ◽  
pp. 335-349 ◽  
Author(s):  
H.-E. Zschau ◽  
W. Zhao ◽  
S. Neve ◽  
B. Gleeson ◽  
M. Schütze
Keyword(s):  
Al Alloys ◽  
Scale Formation ◽  
Al2o3 Scale

18O Tracer studies of Al2O3 scale formation on NiCrAl alloys

1982 ◽  
Vol 17 (5-6) ◽  
pp. 429-449 ◽  
Author(s):  
K. P. R. Reddy ◽  
J. L. Smialek ◽  
A. R. Cooper
Keyword(s):  
Scale Formation ◽  
Al2o3 Scale ◽  
Tracer Studies ◽  
Nicral Alloys

On the Loss of Protective Scale Formation in Creep-Resistant, Alumina-Forming Austenitic Stainless Steels at 900°C in Air

2008 ◽  
Vol 595-598 ◽  
pp. 725-732 ◽  
Author(s):  
M.P. Brady ◽  
Yukinori Yamamoto ◽  
Bruce A. Pint ◽  
M.L. Santella ◽  
P.J. Maziasz ◽  
...  
Keyword(s):  
Internal Oxidation ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Temperature Limit ◽  
Scale Formation ◽  
Second Phase ◽  
Al2o3 Scale ◽  
Internal Nitridation ◽  
Key Factor ◽  
Nb Additions

A family of creep-resistant, Al2O3-forming austenitic (AFA) stainless steels was recently developed. The alloys exhibit excellent oxidation resistance up to ∼800°C, but are susceptible to internal attack of Al at higher temperatures. In the present work, higher levels of Ni, Cr, Al, and Nb additions were found to correlate with improved oxidation behavior at 900°C in air. The alloys generally appeared to be initially capable of external Al2O3 scale formation, with a subsequent transition to internal attack of Al (internal oxidation and internal nitridation) that is dependent on alloy composition. Compositional profiles at the alloy/scale interface suggest that the transition to internal oxidation is preceded by subsurface depletion of Al in the lower-Al compositions. In higher Al-containing compositions, NiAl second-phase precipitates act as an Al reservoir, and Al depletion may not be a key factor. Alloy design directions to increase the upper-temperature limit of protective Al2O3 scale formation in these alloys are discussed.

Effect of Zr addition on alumina scale formation during oxidation of high purity FeCrAlY-alloy

2003 ◽  
Vol 91 (7-8-9) ◽  
pp. 63-69 ◽  
Author(s):  
D. Naumenko ◽  
V. Kochubey ◽  
J. Le Coze ◽  
L. Niewolak ◽  
L. Singheiser ◽  
...  
Keyword(s):  
High Purity ◽  
Alumina Scale ◽  
Scale Formation ◽  
Zr Addition

Scale Formation Minimization on Internal Surface of Seamless Hot-Rolled Pipes

2020 ◽  
Vol 50 (5) ◽  
pp. 340-346
Author(s):  
A. V. Emel’yanov ◽  
I. I. Lube ◽  
V. I. Kuznetsov ◽  
D. A. Levchenko
Keyword(s):  
Internal Surface ◽  
Scale Formation ◽  
Hot Rolled

scholarly journals Investigation on control in oxide scale formation and prevention of peeling off in ultra-supercritical unit

2021 ◽  
Vol 692 (2) ◽  
pp. 022048
Author(s):  
Tianyu Zhang ◽  
Xin Zhang ◽  
Xiufeng Shi ◽  
Zhenning Zhao
Keyword(s):  
Oxide Scale ◽  
Scale Formation ◽  
Peeling Off
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