Effects of Surface Treatments on Environmentally-Assisted Cracking Susceptibility of Alloy 182 in BWR Environment

Zaiqing Que; L. Volpe; Aki Toivonen; M.g. Burke; Fabio Scenini; Ulla Ehrnstén

doi:10.1016/j.corsci.2021.109555

Effects of Surface Treatments on Environmentally-Assisted Cracking Susceptibility of Alloy 182 in BWR Environment

Zaiqing Que^*, L. Volpe^*, Aki Toivonen, M.g. Burke, Fabio Scenini, Ulla Ehrnstén

^*Corresponding author for this work

University of Manchester

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

21 Citations (Scopus)

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Abstract

The effects of four machining surface preparations on the environmentally-assisted cracking (EAC) initiation and early crack growth were evaluated for Alloy 182 flat tapered specimens exposed to a simulated boiling water reactor (BWR) environment under constant extension rate tensile test conditions. Results showed that the apparent EAC critical threshold stress for initiation was highly dependent on the surface treatment. Detailed microstructural characterization revealed the nature of the machining-induced deformation associated with the four surface treatments. Surface treatments affected the surface oxidation during exposure in the simulated BWR environment. The machining-induced deformation structure affected the EAC initiation susceptibility.

Original language	English
Article number	109555
Journal	Corrosion Science
Volume	188
DOIs	https://doi.org/10.1016/j.corsci.2021.109555
Publication status	Published - 1 Aug 2021
MoE publication type	A1 Journal article-refereed

Funding

This project is funded by EU Horizon 2020 project MEACTOS from the EURATOM research and training programme 2014-2018 under grant agreement no. 755151 . Support from the NUGENIA Mobility Programme under the grant number of 02/MG/2020 awarded to Z.

Keywords

Alloy 182
Characterisation
Environmentally-assisted cracking
Stress corrosion cracking
Surface machining

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title = "Effects of Surface Treatments on Environmentally-Assisted Cracking Susceptibility of Alloy 182 in BWR Environment",

abstract = "The effects of four machining surface preparations on the environmentally-assisted cracking (EAC) initiation and early crack growth were evaluated for Alloy 182 flat tapered specimens exposed to a simulated boiling water reactor (BWR) environment under constant extension rate tensile test conditions. Results showed that the apparent EAC critical threshold stress for initiation was highly dependent on the surface treatment. Detailed microstructural characterization revealed the nature of the machining-induced deformation associated with the four surface treatments. Surface treatments affected the surface oxidation during exposure in the simulated BWR environment. The machining-induced deformation structure affected the EAC initiation susceptibility.",

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AU - Que, Zaiqing

AU - Volpe, L.

AU - Toivonen, Aki

AU - Burke, M.g.

AU - Scenini, Fabio

AU - Ehrnstén, Ulla

PY - 2021/8/1

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N2 - The effects of four machining surface preparations on the environmentally-assisted cracking (EAC) initiation and early crack growth were evaluated for Alloy 182 flat tapered specimens exposed to a simulated boiling water reactor (BWR) environment under constant extension rate tensile test conditions. Results showed that the apparent EAC critical threshold stress for initiation was highly dependent on the surface treatment. Detailed microstructural characterization revealed the nature of the machining-induced deformation associated with the four surface treatments. Surface treatments affected the surface oxidation during exposure in the simulated BWR environment. The machining-induced deformation structure affected the EAC initiation susceptibility.

AB - The effects of four machining surface preparations on the environmentally-assisted cracking (EAC) initiation and early crack growth were evaluated for Alloy 182 flat tapered specimens exposed to a simulated boiling water reactor (BWR) environment under constant extension rate tensile test conditions. Results showed that the apparent EAC critical threshold stress for initiation was highly dependent on the surface treatment. Detailed microstructural characterization revealed the nature of the machining-induced deformation associated with the four surface treatments. Surface treatments affected the surface oxidation during exposure in the simulated BWR environment. The machining-induced deformation structure affected the EAC initiation susceptibility.

KW - Alloy 182

KW - Characterisation

KW - Environmentally-assisted cracking

KW - Stress corrosion cracking

KW - Surface machining

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DO - 10.1016/j.corsci.2021.109555

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VL - 188

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JF - Corrosion Science

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Effects of Surface Treatments on Environmentally-Assisted Cracking Susceptibility of Alloy 182 in BWR Environment

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