Advanced microstructural characterization of the intergranular oxidation of Alloy 600

G Bertali; F Scenini; Grace Burke

doi:10.1016/j.corsci.2015.08.010

Advanced microstructural characterization of the intergranular oxidation of Alloy 600

G Bertali, F Scenini, Grace Burke

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Abstract

Oxidation of solution-annealed Alloy 600 has been performed in a hydrogenated steam environment, which is considered to simulate PWR primary water exposure. FIB and analytical TEM characterization, coupled with detailed SEM analyses, provided unequivocal evidence of localized grain boundary migration and intergranular oxide penetrations. These localized migrations were associated with pronounced Cr and Fe depletions, highlighting the role of the grain boundaries for Cr diffusion for intergranular oxidation. These findings are discussed in relation to the early stages of intergranular oxidation, diffusion-induced grain boundary migration and subsequent SCC initiation.

Original language	English
Pages (from-to)	474-483
Number of pages	9
Journal	Corrosion Science
Volume	100
Issue number	November 2015
DOIs	https://doi.org/10.1016/j.corsci.2015.08.010
Publication status	Published - 11 Aug 2015

Keywords

Alloy 600; Preferential intergranular oxidation; Grain boundary migration;Microstructure; AEM

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10.1016/j.corsci.2015.08.010

POST-PEER-REVIEW-NON-PUBLISHERS.PDFAccepted author manuscript, 1.97 MB

http://www.sciencedirect.com/science/article/pii/S0010938X15300421

XRADIA : High Resolution of 4D Imaging of Degradation and Self-repair Processes
Withers, P. (PI), Bailey, C. (CoI) & Lee, P. (CoI)
1/04/12 → 31/03/22
Project: Research

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title = "Advanced microstructural characterization of the intergranular oxidation of Alloy 600",

abstract = "Oxidation of solution-annealed Alloy 600 has been performed in a hydrogenated steam environment, which is considered to simulate PWR primary water exposure. FIB and analytical TEM characterization, coupled with detailed SEM analyses, provided unequivocal evidence of localized grain boundary migration and intergranular oxide penetrations. These localized migrations were associated with pronounced Cr and Fe depletions, highlighting the role of the grain boundaries for Cr diffusion for intergranular oxidation. These findings are discussed in relation to the early stages of intergranular oxidation, diffusion-induced grain boundary migration and subsequent SCC initiation.",

keywords = "Alloy 600; Preferential intergranular oxidation; Grain boundary migration;Microstructure; AEM",

author = "G Bertali and F Scenini and Grace Burke",

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doi = "10.1016/j.corsci.2015.08.010",

language = "English",

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pages = "474--483",

journal = "Corrosion Science",

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T1 - Advanced microstructural characterization of the intergranular oxidation of Alloy 600

AU - Bertali, G

AU - Scenini, F

AU - Burke, Grace

PY - 2015/8/11

Y1 - 2015/8/11

N2 - Oxidation of solution-annealed Alloy 600 has been performed in a hydrogenated steam environment, which is considered to simulate PWR primary water exposure. FIB and analytical TEM characterization, coupled with detailed SEM analyses, provided unequivocal evidence of localized grain boundary migration and intergranular oxide penetrations. These localized migrations were associated with pronounced Cr and Fe depletions, highlighting the role of the grain boundaries for Cr diffusion for intergranular oxidation. These findings are discussed in relation to the early stages of intergranular oxidation, diffusion-induced grain boundary migration and subsequent SCC initiation.

AB - Oxidation of solution-annealed Alloy 600 has been performed in a hydrogenated steam environment, which is considered to simulate PWR primary water exposure. FIB and analytical TEM characterization, coupled with detailed SEM analyses, provided unequivocal evidence of localized grain boundary migration and intergranular oxide penetrations. These localized migrations were associated with pronounced Cr and Fe depletions, highlighting the role of the grain boundaries for Cr diffusion for intergranular oxidation. These findings are discussed in relation to the early stages of intergranular oxidation, diffusion-induced grain boundary migration and subsequent SCC initiation.

KW - Alloy 600; Preferential intergranular oxidation; Grain boundary migration;Microstructure; AEM

U2 - 10.1016/j.corsci.2015.08.010

DO - 10.1016/j.corsci.2015.08.010

M3 - Article

SN - 0010-938X

VL - 100

SP - 474

EP - 483

JO - Corrosion Science

JF - Corrosion Science

IS - November 2015

ER -

Advanced microstructural characterization of the intergranular oxidation of Alloy 600

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Keywords

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Projects

XRADIA : High Resolution of 4D Imaging of Degradation and Self-repair Processes

Cite this