Modeling carbide dissolution in alloy 602 CA during high temperature oxidation

A. Chyrkin; R. Pillai; H. Ackermann; H. Hattendorf; S. Richter; W. Nowak; D. Grüner; W. J. Quadakkers

doi:10.1016/j.corsci.2015.03.019

Modeling carbide dissolution in alloy 602 CA during high temperature oxidation

A. Chyrkin, R. Pillai, H. Ackermann, H. Hattendorf, S. Richter, W. Nowak, D. Grüner, W. J. Quadakkers

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

55 Scopus citations

Abstract

The high-temperature oxidation resistance of the carbide strengthened nickel-base alloy 602 CA is provided by the formation of a protective outer Cr₂O₃ scale accompanied by internal precipitation of alumina and dissolution of Cr-rich carbides. The carbide free zone formation has been discussed in the literature to be a consequence of either chromium depletion or alloy decarburization.A new dissolution mechanism is proposed in this paper. Carbide dissolution in alloy 602 CA exposed to oxidizing atmospheres at 1100. °C was studied. The alloy microstructure was characterized by means of SEM/EDX/EPMA and GDOES. The experimental observations were substantiated by CALPHAD based computations.

Original language	English
Pages (from-to)	32-41
Number of pages	10
Journal	Corrosion Science
Volume	96
DOIs	https://doi.org/10.1016/j.corsci.2015.03.019
State	Published - Jul 1 2015
Externally published	Yes

Keywords

A. nickel
A. superalloys
B. modelling studies
C. high temperature corrosion
C. internal oxidation

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10.1016/j.corsci.2015.03.019

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title = "Modeling carbide dissolution in alloy 602 CA during high temperature oxidation",

abstract = "The high-temperature oxidation resistance of the carbide strengthened nickel-base alloy 602 CA is provided by the formation of a protective outer Cr2O3 scale accompanied by internal precipitation of alumina and dissolution of Cr-rich carbides. The carbide free zone formation has been discussed in the literature to be a consequence of either chromium depletion or alloy decarburization.A new dissolution mechanism is proposed in this paper. Carbide dissolution in alloy 602 CA exposed to oxidizing atmospheres at 1100. °C was studied. The alloy microstructure was characterized by means of SEM/EDX/EPMA and GDOES. The experimental observations were substantiated by CALPHAD based computations.",

keywords = "A. nickel, A. superalloys, B. modelling studies, C. high temperature corrosion, C. internal oxidation",

author = "A. Chyrkin and R. Pillai and H. Ackermann and H. Hattendorf and S. Richter and W. Nowak and D. Gr{\"u}ner and Quadakkers, {W. J.}",

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doi = "10.1016/j.corsci.2015.03.019",

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TY - JOUR

T1 - Modeling carbide dissolution in alloy 602 CA during high temperature oxidation

AU - Chyrkin, A.

AU - Pillai, R.

AU - Ackermann, H.

AU - Hattendorf, H.

AU - Richter, S.

AU - Nowak, W.

AU - Grüner, D.

AU - Quadakkers, W. J.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - The high-temperature oxidation resistance of the carbide strengthened nickel-base alloy 602 CA is provided by the formation of a protective outer Cr2O3 scale accompanied by internal precipitation of alumina and dissolution of Cr-rich carbides. The carbide free zone formation has been discussed in the literature to be a consequence of either chromium depletion or alloy decarburization.A new dissolution mechanism is proposed in this paper. Carbide dissolution in alloy 602 CA exposed to oxidizing atmospheres at 1100. °C was studied. The alloy microstructure was characterized by means of SEM/EDX/EPMA and GDOES. The experimental observations were substantiated by CALPHAD based computations.

AB - The high-temperature oxidation resistance of the carbide strengthened nickel-base alloy 602 CA is provided by the formation of a protective outer Cr2O3 scale accompanied by internal precipitation of alumina and dissolution of Cr-rich carbides. The carbide free zone formation has been discussed in the literature to be a consequence of either chromium depletion or alloy decarburization.A new dissolution mechanism is proposed in this paper. Carbide dissolution in alloy 602 CA exposed to oxidizing atmospheres at 1100. °C was studied. The alloy microstructure was characterized by means of SEM/EDX/EPMA and GDOES. The experimental observations were substantiated by CALPHAD based computations.

KW - A. nickel

KW - A. superalloys

KW - B. modelling studies

KW - C. high temperature corrosion

KW - C. internal oxidation

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U2 - 10.1016/j.corsci.2015.03.019

DO - 10.1016/j.corsci.2015.03.019

M3 - Article

AN - SCOPUS:84929519323

SN - 0010-938X

VL - 96

SP - 32

EP - 41

JO - Corrosion Science

JF - Corrosion Science

ER -

Modeling carbide dissolution in alloy 602 CA during high temperature oxidation

Abstract

Keywords

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