EXPLORING NANOSCALE PRECURSOR REACTIONS IN ALLOY 600 IN H2/N2-H2O VAPOR USING IN SITU ANALYTICAL TRANSMISSION ELECTRON MICROSCOPY

M. Grace Burke; Giacomo Bertali; Fabio Scenini; Sarah Haigh; Eric Prestat

doi:10.1007/978-3-319-67244-1_25

EXPLORING NANOSCALE PRECURSOR REACTIONS IN ALLOY 600 IN H₂/N₂-H₂O VAPOR USING IN SITU ANALYTICAL TRANSMISSION ELECTRON MICROSCOPY

M. Grace Burke, Giacomo Bertali, Fabio Scenini, Sarah Haigh, Eric Prestat

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Oxidation studies were performed on Alloy 600 in situ in high-temperature H₂/N₂ + H₂O vapor mixture at 400°C. The initial stages of preferential intergranular oxidation (PIO), shown to be an important precursor phenomenon for primary water stress corrosion cracking, have been successfully identified using the in situ approach. The behaviour of Alloy 600 was observed in real time using the Protochips environmental cell and analysed via analytical electron microscopy (AEM). Post in situ AEM analyses were compared with previous ex situ post-exposure characterization results obtained from bulk specimens, demonstrating good agreement. The in situ results confirmed the grain boundary migration and intergranular oxide formation in Alloy 600SA. The excellent agreement between the in situ and previous studies demonstrates that this approach can be used to investigate the initial stages of PIO relevant to nuclear power systems.

Original language	English
Title of host publication	18th International Conference on Environmental Degradation in Nuclear Power Systems
DOIs	https://doi.org/10.1007/978-3-319-67244-1_25
Publication status	Published - 2017

Keywords

Alloy 600
Stress corrosion cracking
Preferential intergranular oxidation
diffusion-induced grain boundary migration
Analytical electron microscopy
in situ analytical transmission electron microscopy
energy dispersive X-ray spectroscopy

Access to Document

10.1007/978-3-319-67244-1_25

Cite this

@inproceedings{e463245d37874bf2861e382c86734c8e,

title = "EXPLORING NANOSCALE PRECURSOR REACTIONS IN ALLOY 600 IN H2/N2-H2O VAPOR USING IN SITU ANALYTICAL TRANSMISSION ELECTRON MICROSCOPY",

abstract = "Oxidation studies were performed on Alloy 600 in situ in high-temperature H2/N2 + H2O vapor mixture at 400°C. The initial stages of preferential intergranular oxidation (PIO), shown to be an important precursor phenomenon for primary water stress corrosion cracking, have been successfully identified using the in situ approach. The behaviour of Alloy 600 was observed in real time using the Protochips environmental cell and analysed via analytical electron microscopy (AEM). Post in situ AEM analyses were compared with previous ex situ post-exposure characterization results obtained from bulk specimens, demonstrating good agreement. The in situ results confirmed the grain boundary migration and intergranular oxide formation in Alloy 600SA. The excellent agreement between the in situ and previous studies demonstrates that this approach can be used to investigate the initial stages of PIO relevant to nuclear power systems.",

keywords = "Alloy 600, Stress corrosion cracking, Preferential intergranular oxidation, diffusion-induced grain boundary migration, Analytical electron microscopy, in situ analytical transmission electron microscopy, energy dispersive X-ray spectroscopy",

author = "Burke, {M. Grace} and Giacomo Bertali and Fabio Scenini and Sarah Haigh and Eric Prestat",

year = "2017",

doi = "10.1007/978-3-319-67244-1_25",

language = "English",

booktitle = "18th International Conference on Environmental Degradation in Nuclear Power Systems",

}

EXPLORING NANOSCALE PRECURSOR REACTIONS IN ALLOY 600 IN H₂/N₂-H₂O VAPOR USING IN SITU ANALYTICAL TRANSMISSION ELECTRON MICROSCOPY. / Burke, M. Grace; Bertali, Giacomo; Scenini, Fabio et al.
18th International Conference on Environmental Degradation in Nuclear Power Systems . 2017.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - EXPLORING NANOSCALE PRECURSOR REACTIONS IN ALLOY 600 IN H2/N2-H2O VAPOR USING IN SITU ANALYTICAL TRANSMISSION ELECTRON MICROSCOPY

AU - Burke, M. Grace

AU - Bertali, Giacomo

AU - Scenini, Fabio

AU - Haigh, Sarah

AU - Prestat, Eric

PY - 2017

Y1 - 2017

N2 - Oxidation studies were performed on Alloy 600 in situ in high-temperature H2/N2 + H2O vapor mixture at 400°C. The initial stages of preferential intergranular oxidation (PIO), shown to be an important precursor phenomenon for primary water stress corrosion cracking, have been successfully identified using the in situ approach. The behaviour of Alloy 600 was observed in real time using the Protochips environmental cell and analysed via analytical electron microscopy (AEM). Post in situ AEM analyses were compared with previous ex situ post-exposure characterization results obtained from bulk specimens, demonstrating good agreement. The in situ results confirmed the grain boundary migration and intergranular oxide formation in Alloy 600SA. The excellent agreement between the in situ and previous studies demonstrates that this approach can be used to investigate the initial stages of PIO relevant to nuclear power systems.

AB - Oxidation studies were performed on Alloy 600 in situ in high-temperature H2/N2 + H2O vapor mixture at 400°C. The initial stages of preferential intergranular oxidation (PIO), shown to be an important precursor phenomenon for primary water stress corrosion cracking, have been successfully identified using the in situ approach. The behaviour of Alloy 600 was observed in real time using the Protochips environmental cell and analysed via analytical electron microscopy (AEM). Post in situ AEM analyses were compared with previous ex situ post-exposure characterization results obtained from bulk specimens, demonstrating good agreement. The in situ results confirmed the grain boundary migration and intergranular oxide formation in Alloy 600SA. The excellent agreement between the in situ and previous studies demonstrates that this approach can be used to investigate the initial stages of PIO relevant to nuclear power systems.

KW - Alloy 600

KW - Stress corrosion cracking

KW - Preferential intergranular oxidation

KW - diffusion-induced grain boundary migration

KW - Analytical electron microscopy

KW - in situ analytical transmission electron microscopy

KW - energy dispersive X-ray spectroscopy

U2 - 10.1007/978-3-319-67244-1_25

DO - 10.1007/978-3-319-67244-1_25

M3 - Conference contribution

BT - 18th International Conference on Environmental Degradation in Nuclear Power Systems