scholarly journals A review of the effects of microalloying constituents on the formation and breakdown of protective oxide scales on high-temperature alloys at temperatures below 700 degree C

1989 ◽  
Author(s):  
I. Wright ◽  
J. Colwell
Keyword(s):  
High Temperature ◽  
Oxide Scales ◽  
Protective Oxide ◽  
High Temperature Alloys

scholarly journals Exploring the Effect of Silicon on the High Temperature Corrosion of Lean FeCrAl Alloys in Humid Air

2021 ◽  
Author(s):  
T. Sand ◽  
A. Edgren ◽  
C. Geers ◽  
V. Asokan ◽  
J. Eklund ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Oxidation Behavior ◽  
High Temperature Corrosion ◽  
The Other ◽  
Oxide Scales ◽  
Protective Oxide ◽  
New Approach ◽  
Fecral Alloys ◽  
Cr Evaporation

AbstractA new approach to reduce the chromium and aluminium concentrations in FeCrAl alloys without significantly impairing corrosion resistance is to alloy with 1–2 wt.% silicon. This paper investigates the “silicon effect” on oxidation by comparing the oxidation behavior and scale microstructure of two FeCrAl alloys, one alloyed with silicon and the other not, in dry and wet air at 600 °C and 800 °C. Both alloys formed thin protective oxide scales and the Cr-evaporation rates were small. In wet air at 800 °C the Si-alloyed FeCrAl formed an oxide scale containing mullite and tridymite together with α- and γ-alumina. It is suggested that the reported improvement of the corrosion resistance of Al- and Cr-lean FeCrAl’s by silicon alloying is caused by the appearance of Si-rich phases in the scale.

Analysis of composition and growth mechanisms of oxide scales on high temperature alloys by SNMS, SIMS, and RBS

1992 ◽  
Vol 107 (3-6) ◽  
pp. 197-206 ◽  
Author(s):  
W. J. Quadakkers ◽  
A. Elschner ◽  
H. Holzbrecher ◽  
K. Schmidt ◽  
W. Speier ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxide Scales ◽  
Growth Mechanisms ◽  
High Temperature Alloys

Radiotracer studies of carbon permeation through oxide scales on commercial high temperature alloys and model alloys

1983 ◽  
Vol 34 (10) ◽  
pp. 495-500 ◽  
Author(s):  
H. J. Grabke ◽  
Klaus Ohla ◽  
Jörg Peters ◽  
Irene Wolf
Keyword(s):  
High Temperature ◽  
Oxide Scales ◽  
High Temperature Alloys

Integrating methods for the analysis of oxide scales on high-temperature alloys using GDOS and EPMA

1991 ◽  
Vol 341 (5-6) ◽  
pp. 421-426 ◽  
Author(s):  
H. Nickel ◽  
H. Gr�bmeier ◽  
D. Guntur ◽  
M. Mazurkiewicz ◽  
A. Naoumidis
Keyword(s):  
High Temperature ◽  
Oxide Scales ◽  
High Temperature Alloys

A numerical analysis of oxide spallation

1993 ◽  
Vol 440 (1908) ◽  
pp. 1-22 ◽  
Keyword(s):  
High Temperature ◽  
Numerical Analysis ◽  
Interfacial Crack ◽  
Elastic Behaviour ◽  
Metal Interface ◽  
Protective Oxide ◽  
High Temperature Alloys ◽  
Deformation Processes ◽  
Oxide Spallation ◽  
Wedge Crack

During the cooling of protective oxide layers on high-temperature alloys, the oxide is usually placed under compression. This paper considers buckling and wedging processes of decohesion of the oxide in this situation. It is shown that the wedging mechanism, in which a tensile wedge crack grows at the oxide–metal interface, is favoured for thick oxides and an intrinsically strong oxide–metal interface. The results of numerical analyses of such wedging failure are presented for the particular case of a chromia film on an austenitic steel. Both elastic and creep deformation processes were considered. It is shown that creep relaxation within the steel markedly reduces the rate of growth of the interfacial crack compared with purely elastic behaviour. Agreement with experimental oxide spallation data is reasonable for this creep case.

The formation of aluminum oxide scales on high-temperature alloys

1992 ◽  
Vol 38 (3-4) ◽  
pp. 233-254 ◽  
Author(s):  
R. Prescott ◽  
M. J. Graham
Keyword(s):  
High Temperature ◽  
Aluminum Oxide ◽  
Oxide Scales ◽  
High Temperature Alloys
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