Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water

Zhanpeng Lu; Tetsuo Shoji; Seiya Yamazaki; Kazuhiro Ogawa

doi:10.1016/j.corsci.2012.01.029

Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water

Zhanpeng Lu, Tetsuo Shoji, Seiya Yamazaki, Kazuhiro Ogawa

ENG - Fracture and Reliability Research Institute

Tohoku University

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

65 Citations (Scopus)

Abstract

With increasing the distance from the weld fusion line in an Alloy 600 heat-affected zone, kernel average misorientation decreases and the fraction of Σ3 boundaries increases. Cr ₇C ₃ carbides mainly precipitate at random high angle boundaries. Chromium depletion and segregation of boron and phosphorous at grain boundaries are observed. Alloy 600 heat-affected zone specimens exhibit higher intergranular stress corrosion cracking growth rates than that in the base metal in simulated pressurized water reactor water environments. Crack growth rate is enhanced by strain hardening and by increasing temperature. The role of stress on interface oxidation kinetics is analyzed.

Original language	English
Pages (from-to)	211-228
Number of pages	18
Journal	Corrosion Science
Volume	58
DOIs	https://doi.org/10.1016/j.corsci.2012.01.029
Publication status	Published - 2012 May

Keywords

A. Superalloy
B. SEM
C. Hardening
C. Reactor conditions
C. Stress corrosion
C. Welding

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10.1016/j.corsci.2012.01.029

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title = "Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water",

abstract = "With increasing the distance from the weld fusion line in an Alloy 600 heat-affected zone, kernel average misorientation decreases and the fraction of Σ3 boundaries increases. Cr 7C 3 carbides mainly precipitate at random high angle boundaries. Chromium depletion and segregation of boron and phosphorous at grain boundaries are observed. Alloy 600 heat-affected zone specimens exhibit higher intergranular stress corrosion cracking growth rates than that in the base metal in simulated pressurized water reactor water environments. Crack growth rate is enhanced by strain hardening and by increasing temperature. The role of stress on interface oxidation kinetics is analyzed.",

keywords = "A. Superalloy, B. SEM, C. Hardening, C. Reactor conditions, C. Stress corrosion, C. Welding",

author = "Zhanpeng Lu and Tetsuo Shoji and Seiya Yamazaki and Kazuhiro Ogawa",

note = "Funding Information: This work has been performed as a part of the PEACE-E program jointly supported EDF, EPRI, SSM, TEPCO, KEPCO, TohokuEPCO, ChubuEPCO, JAPCO, HITACHI Ltd., MHI, TOSHIBA Co., and IHI. This work has been also performed under the support of Grant-in-Aid for Scientific Research (S) 17106002 and (C) 23560078, Japan Society for the Promotion of Science, and the support of the International Cooperative Program for Education and Research, the Japanese Ministry of Education, Culture, Sports, Science and Technology. ",

year = "2012",

month = may,

doi = "10.1016/j.corsci.2012.01.029",

language = "English",

volume = "58",

pages = "211--228",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water

AU - Lu, Zhanpeng

AU - Shoji, Tetsuo

AU - Yamazaki, Seiya

AU - Ogawa, Kazuhiro

N1 - Funding Information: This work has been performed as a part of the PEACE-E program jointly supported EDF, EPRI, SSM, TEPCO, KEPCO, TohokuEPCO, ChubuEPCO, JAPCO, HITACHI Ltd., MHI, TOSHIBA Co., and IHI. This work has been also performed under the support of Grant-in-Aid for Scientific Research (S) 17106002 and (C) 23560078, Japan Society for the Promotion of Science, and the support of the International Cooperative Program for Education and Research, the Japanese Ministry of Education, Culture, Sports, Science and Technology.

PY - 2012/5

Y1 - 2012/5

N2 - With increasing the distance from the weld fusion line in an Alloy 600 heat-affected zone, kernel average misorientation decreases and the fraction of Σ3 boundaries increases. Cr 7C 3 carbides mainly precipitate at random high angle boundaries. Chromium depletion and segregation of boron and phosphorous at grain boundaries are observed. Alloy 600 heat-affected zone specimens exhibit higher intergranular stress corrosion cracking growth rates than that in the base metal in simulated pressurized water reactor water environments. Crack growth rate is enhanced by strain hardening and by increasing temperature. The role of stress on interface oxidation kinetics is analyzed.

AB - With increasing the distance from the weld fusion line in an Alloy 600 heat-affected zone, kernel average misorientation decreases and the fraction of Σ3 boundaries increases. Cr 7C 3 carbides mainly precipitate at random high angle boundaries. Chromium depletion and segregation of boron and phosphorous at grain boundaries are observed. Alloy 600 heat-affected zone specimens exhibit higher intergranular stress corrosion cracking growth rates than that in the base metal in simulated pressurized water reactor water environments. Crack growth rate is enhanced by strain hardening and by increasing temperature. The role of stress on interface oxidation kinetics is analyzed.

KW - A. Superalloy

KW - B. SEM

KW - C. Hardening

KW - C. Reactor conditions

KW - C. Stress corrosion

KW - C. Welding

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U2 - 10.1016/j.corsci.2012.01.029

DO - 10.1016/j.corsci.2012.01.029

M3 - Article

AN - SCOPUS:84858623123

SN - 0010-938X

VL - 58

SP - 211

EP - 228

JO - Corrosion Science

JF - Corrosion Science

ER -

Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water

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Keywords

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