Comparison of oxide layers formed on the low-cycle fatigue crack surfaces of Alloy 690 and 316 SS tested in a simulated PWR environment

Junjie Chen; Andrieanto Nurrochman; Jong Dae Hong; Tae Soon Kim; Changheui Jang; Yongsun Yi

doi:10.1016/j.net.2018.10.007

Comparison of oxide layers formed on the low-cycle fatigue crack surfaces of Alloy 690 and 316 SS tested in a simulated PWR environment

Junjie Chen, Andrieanto Nurrochman, Jong Dae Hong, Tae Soon Kim, Changheui Jang, Yongsun Yi

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

17 Scopus citations

Abstract

Low-cycle fatigue (LCF) tests were performed for Alloy 690 and 316 SS in a simulated pressurized water reactor (PWR) environment. Alloy 690 showed about twice longer LCF life than 316 SS at the test condition of 0.4% amplitude at strain rate of 0.004%/s. Observation of the oxide layers formed on the fatigue crack surface showed that Cr and Ni rich oxide was formed for Alloy 690, while Fe and Cr rich oxide for 316 SS as an inner layer. Electrochemical analysis revealed that the oxide layers formed on the LCF crack surface of Alloy 690 had higher impedance and less defect density than those of 316 SS, which resulted in longer LCF life of Alloy 690 than 316 SS in a simulated PWR environment.

Original language	British English
Pages (from-to)	479-489
Number of pages	11
Journal	Nuclear Engineering and Technology
Volume	51
Issue number	2
DOIs	https://doi.org/10.1016/j.net.2018.10.007
State	Published - Apr 2019

Keywords

316 SS
Alloy 690
Electrochemical analysis
Environmentally-assisted fatigue
Oxide layer

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title = "Comparison of oxide layers formed on the low-cycle fatigue crack surfaces of Alloy 690 and 316 SS tested in a simulated PWR environment",

abstract = "Low-cycle fatigue (LCF) tests were performed for Alloy 690 and 316 SS in a simulated pressurized water reactor (PWR) environment. Alloy 690 showed about twice longer LCF life than 316 SS at the test condition of 0.4% amplitude at strain rate of 0.004%/s. Observation of the oxide layers formed on the fatigue crack surface showed that Cr and Ni rich oxide was formed for Alloy 690, while Fe and Cr rich oxide for 316 SS as an inner layer. Electrochemical analysis revealed that the oxide layers formed on the LCF crack surface of Alloy 690 had higher impedance and less defect density than those of 316 SS, which resulted in longer LCF life of Alloy 690 than 316 SS in a simulated PWR environment.",

keywords = "316 SS, Alloy 690, Electrochemical analysis, Environmentally-assisted fatigue, Oxide layer",

author = "Junjie Chen and Andrieanto Nurrochman and Hong, {Jong Dae} and Kim, {Tae Soon} and Changheui Jang and Yongsun Yi",

note = "Funding Information: This study was in part supported by the Korea Hydro and Nuclear Power Co., Ltd . as the Proactive Material Aging Management Project. Additional funding was provided by the KUSTAR-KAIST Institute of KAIST and MSIP/NRF (Engineering Research Center No. 2016R1A5A1013919 ) of MSIP of the Republic of Korea. Financial support for two of the authors was provided by the BK-Plus Program of the MSIP of the Republic of Korea . Publisher Copyright: {\textcopyright} 2018",

year = "2019",

month = apr,

doi = "10.1016/j.net.2018.10.007",

language = "British English",

volume = "51",

pages = "479--489",

journal = "Nuclear Engineering and Technology",

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T1 - Comparison of oxide layers formed on the low-cycle fatigue crack surfaces of Alloy 690 and 316 SS tested in a simulated PWR environment

AU - Chen, Junjie

AU - Nurrochman, Andrieanto

AU - Hong, Jong Dae

AU - Kim, Tae Soon

AU - Jang, Changheui

AU - Yi, Yongsun

N1 - Funding Information: This study was in part supported by the Korea Hydro and Nuclear Power Co., Ltd . as the Proactive Material Aging Management Project. Additional funding was provided by the KUSTAR-KAIST Institute of KAIST and MSIP/NRF (Engineering Research Center No. 2016R1A5A1013919 ) of MSIP of the Republic of Korea. Financial support for two of the authors was provided by the BK-Plus Program of the MSIP of the Republic of Korea . Publisher Copyright: © 2018

PY - 2019/4

Y1 - 2019/4

N2 - Low-cycle fatigue (LCF) tests were performed for Alloy 690 and 316 SS in a simulated pressurized water reactor (PWR) environment. Alloy 690 showed about twice longer LCF life than 316 SS at the test condition of 0.4% amplitude at strain rate of 0.004%/s. Observation of the oxide layers formed on the fatigue crack surface showed that Cr and Ni rich oxide was formed for Alloy 690, while Fe and Cr rich oxide for 316 SS as an inner layer. Electrochemical analysis revealed that the oxide layers formed on the LCF crack surface of Alloy 690 had higher impedance and less defect density than those of 316 SS, which resulted in longer LCF life of Alloy 690 than 316 SS in a simulated PWR environment.

AB - Low-cycle fatigue (LCF) tests were performed for Alloy 690 and 316 SS in a simulated pressurized water reactor (PWR) environment. Alloy 690 showed about twice longer LCF life than 316 SS at the test condition of 0.4% amplitude at strain rate of 0.004%/s. Observation of the oxide layers formed on the fatigue crack surface showed that Cr and Ni rich oxide was formed for Alloy 690, while Fe and Cr rich oxide for 316 SS as an inner layer. Electrochemical analysis revealed that the oxide layers formed on the LCF crack surface of Alloy 690 had higher impedance and less defect density than those of 316 SS, which resulted in longer LCF life of Alloy 690 than 316 SS in a simulated PWR environment.

KW - 316 SS

KW - Alloy 690

KW - Electrochemical analysis

KW - Environmentally-assisted fatigue

KW - Oxide layer

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JO - Nuclear Engineering and Technology

JF - Nuclear Engineering and Technology

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Comparison of oxide layers formed on the low-cycle fatigue crack surfaces of Alloy 690 and 316 SS tested in a simulated PWR environment

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