External Α-Al2O3 scale on Ni-base alloy 602 CA – Part II: Microstructural evolution

R. Pillai; A. Chyrkin; T. Galiullin; E. Wessel; D. Grüner; W. J. Quadakkers

doi:10.1016/j.corsci.2017.07.021

External Α-Al₂O₃ scale on Ni-base alloy 602 CA – Part II: Microstructural evolution

R. Pillai, A. Chyrkin, T. Galiullin, E. Wessel, D. Grüner, W. J. Quadakkers

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

The growth of protective α-Al₂O₃ scales on the NiCrAl-base alloy 602 CA at 1100 °C and 1200 °C was promoted by multi-step oxidation treatments. Different microstructural changes were observed during high temperature exposures in the pre-oxidised specimens as compared to the bare specimens. A coupled thermodynamic-kinetic model was employed to describe the influence of pre-oxidation on the microstructural evolution in the alloy. The model was able to correctly predict the mechanisms of the dissolution and re-precipitation of the carbides in the pre-oxidised and bare specimens.

Original language	English
Pages (from-to)	27-38
Number of pages	12
Journal	Corrosion Science
Volume	127
DOIs	https://doi.org/10.1016/j.corsci.2017.07.021
State	Published - Oct 2017
Externally published	Yes

Keywords

Carbide-free-zone
Carbides
Diffusion
Ni-base alloy
Pre-oxidation

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10.1016/j.corsci.2017.07.021

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title = "External Α-Al2O3 scale on Ni-base alloy 602 CA – Part II: Microstructural evolution",

abstract = "The growth of protective α-Al2O3 scales on the NiCrAl-base alloy 602 CA at 1100 °C and 1200 °C was promoted by multi-step oxidation treatments. Different microstructural changes were observed during high temperature exposures in the pre-oxidised specimens as compared to the bare specimens. A coupled thermodynamic-kinetic model was employed to describe the influence of pre-oxidation on the microstructural evolution in the alloy. The model was able to correctly predict the mechanisms of the dissolution and re-precipitation of the carbides in the pre-oxidised and bare specimens.",

keywords = "Carbide-free-zone, Carbides, Diffusion, Ni-base alloy, Pre-oxidation",

author = "R. Pillai and A. Chyrkin and T. Galiullin and E. Wessel and D. Gr{\"u}ner and Quadakkers, {W. J.}",

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T1 - External Α-Al2O3 scale on Ni-base alloy 602 CA – Part II

T2 - Microstructural evolution

AU - Pillai, R.

AU - Chyrkin, A.

AU - Galiullin, T.

AU - Wessel, E.

AU - Grüner, D.

AU - Quadakkers, W. J.

PY - 2017/10

Y1 - 2017/10

N2 - The growth of protective α-Al2O3 scales on the NiCrAl-base alloy 602 CA at 1100 °C and 1200 °C was promoted by multi-step oxidation treatments. Different microstructural changes were observed during high temperature exposures in the pre-oxidised specimens as compared to the bare specimens. A coupled thermodynamic-kinetic model was employed to describe the influence of pre-oxidation on the microstructural evolution in the alloy. The model was able to correctly predict the mechanisms of the dissolution and re-precipitation of the carbides in the pre-oxidised and bare specimens.

AB - The growth of protective α-Al2O3 scales on the NiCrAl-base alloy 602 CA at 1100 °C and 1200 °C was promoted by multi-step oxidation treatments. Different microstructural changes were observed during high temperature exposures in the pre-oxidised specimens as compared to the bare specimens. A coupled thermodynamic-kinetic model was employed to describe the influence of pre-oxidation on the microstructural evolution in the alloy. The model was able to correctly predict the mechanisms of the dissolution and re-precipitation of the carbides in the pre-oxidised and bare specimens.

KW - Carbide-free-zone

KW - Carbides

KW - Diffusion

KW - Ni-base alloy

KW - Pre-oxidation

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DO - 10.1016/j.corsci.2017.07.021

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SN - 0010-938X

VL - 127

SP - 27

EP - 38

JO - Corrosion Science

JF - Corrosion Science

ER -

External Α-Al₂O₃ scale on Ni-base alloy 602 CA – Part II: Microstructural evolution

Abstract

Keywords

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