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

60 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.\}",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

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

language = "English",

volume = "96",

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journal = "Corrosion Science",

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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

UR - https://www.scopus.com/pages/publications/84929519323

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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