Intergranular environmentally assisted cracking of Alloy 182 weld metal in simulated normal water chemistry of boiling water reactor

Qunjia Peng; Tetsuo Shoji; Hiroyuki Yamauchi; Yoichi Takeda

doi:10.1016/j.corsci.2006.12.022

Intergranular environmentally assisted cracking of Alloy 182 weld metal in simulated normal water chemistry of boiling water reactor

Qunjia Peng, Tetsuo Shoji, Hiroyuki Yamauchi, Yoichi Takeda

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

36 Citations (Scopus)

Abstract

Following characterization of grain boundaries in Alloy 182 weld metal, intergranular environmentally assisted cracking (IGEAC) growth behavior of the alloy in simulated normal water chemistry (NWC) of boiling water reactor (BWR) was tested by employing a crack growth rate test. The grain boundary was found consist of about 72% random boundaries, 21% low-angle boundaries and a few coincident boundaries. The correlation between the grain boundary characters and IGEAC was discussed. Based on the IGEAC growth rates obtained in the test and evaluations of the crack tip strain rate, the parameter of the slip-dissolution/oxidation model that embodies the kinetics of oxidation/repassivation in the crack-tip environment of Alloy 182 in BWR-NWC was quantitatively determined.

Original language	English
Pages (from-to)	2767-2780
Number of pages	14
Journal	Corrosion Science
Volume	49
Issue number	6
DOIs	https://doi.org/10.1016/j.corsci.2006.12.022
Publication status	Published - 2007 Jun

Keywords

A. Superalloys
C. Intergranular corrosion
C. Repassivation

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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10.1016/j.corsci.2006.12.022

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title = "Intergranular environmentally assisted cracking of Alloy 182 weld metal in simulated normal water chemistry of boiling water reactor",

abstract = "Following characterization of grain boundaries in Alloy 182 weld metal, intergranular environmentally assisted cracking (IGEAC) growth behavior of the alloy in simulated normal water chemistry (NWC) of boiling water reactor (BWR) was tested by employing a crack growth rate test. The grain boundary was found consist of about 72% random boundaries, 21% low-angle boundaries and a few coincident boundaries. The correlation between the grain boundary characters and IGEAC was discussed. Based on the IGEAC growth rates obtained in the test and evaluations of the crack tip strain rate, the parameter of the slip-dissolution/oxidation model that embodies the kinetics of oxidation/repassivation in the crack-tip environment of Alloy 182 in BWR-NWC was quantitatively determined.",

keywords = "A. Superalloys, C. Intergranular corrosion, C. Repassivation",

author = "Qunjia Peng and Tetsuo Shoji and Hiroyuki Yamauchi and Yoichi Takeda",

note = "Funding Information: This work is supported by Japan Power Engineering and Inspection Corporation (JAPEIC) through a safety research program, and is partially supported by a joint research project on Reliability Centered Life Time Prediction of Environmentally Assisted Cracking, No. URIPR-0102F (Phase II), and the Grant-in-Aid for Center of Excellence (COE) Research (No. 11CE2003). Discussions with Z.P. Lu, S. Douglas and Z.J. Wang are highly appreciated. One of the authors (Q.J. Peng) would like to thank Japan Society for the Promotion of Science (JSPS) for the support through a Postdoctoral Research Fellow Program. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

month = jun,

doi = "10.1016/j.corsci.2006.12.022",

language = "English",

volume = "49",

pages = "2767--2780",

journal = "Corrosion Science",

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AU - Peng, Qunjia

AU - Shoji, Tetsuo

AU - Yamauchi, Hiroyuki

AU - Takeda, Yoichi

N1 - Funding Information: This work is supported by Japan Power Engineering and Inspection Corporation (JAPEIC) through a safety research program, and is partially supported by a joint research project on Reliability Centered Life Time Prediction of Environmentally Assisted Cracking, No. URIPR-0102F (Phase II), and the Grant-in-Aid for Center of Excellence (COE) Research (No. 11CE2003). Discussions with Z.P. Lu, S. Douglas and Z.J. Wang are highly appreciated. One of the authors (Q.J. Peng) would like to thank Japan Society for the Promotion of Science (JSPS) for the support through a Postdoctoral Research Fellow Program. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007/6

Y1 - 2007/6

N2 - Following characterization of grain boundaries in Alloy 182 weld metal, intergranular environmentally assisted cracking (IGEAC) growth behavior of the alloy in simulated normal water chemistry (NWC) of boiling water reactor (BWR) was tested by employing a crack growth rate test. The grain boundary was found consist of about 72% random boundaries, 21% low-angle boundaries and a few coincident boundaries. The correlation between the grain boundary characters and IGEAC was discussed. Based on the IGEAC growth rates obtained in the test and evaluations of the crack tip strain rate, the parameter of the slip-dissolution/oxidation model that embodies the kinetics of oxidation/repassivation in the crack-tip environment of Alloy 182 in BWR-NWC was quantitatively determined.

AB - Following characterization of grain boundaries in Alloy 182 weld metal, intergranular environmentally assisted cracking (IGEAC) growth behavior of the alloy in simulated normal water chemistry (NWC) of boiling water reactor (BWR) was tested by employing a crack growth rate test. The grain boundary was found consist of about 72% random boundaries, 21% low-angle boundaries and a few coincident boundaries. The correlation between the grain boundary characters and IGEAC was discussed. Based on the IGEAC growth rates obtained in the test and evaluations of the crack tip strain rate, the parameter of the slip-dissolution/oxidation model that embodies the kinetics of oxidation/repassivation in the crack-tip environment of Alloy 182 in BWR-NWC was quantitatively determined.

KW - A. Superalloys

KW - C. Intergranular corrosion

KW - C. Repassivation

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Intergranular environmentally assisted cracking of Alloy 182 weld metal in simulated normal water chemistry of boiling water reactor

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