An examination of the precipitation behavior of proton irradiated dual phase 308L weldment filler materials

Zhen Li; Xun Zhan; Waclaw Swiech; Honghui Zhou; Weicheng Zhong; Benjamin J. Sutton; Carly J. Romnes; Dhruval K. Patel; Nachiket S. Shah; Brent J. Heuser

doi:10.1016/j.jnucmat.2023.154287

An examination of the precipitation behavior of proton irradiated dual phase 308L weldment filler materials

Zhen Li, Xun Zhan, Waclaw Swiech, Honghui Zhou, Weicheng Zhong, Benjamin J. Sutton, Carly J. Romnes, Dhruval K. Patel, Nachiket S. Shah, Brent J. Heuser

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

2 Scopus citations

Abstract

Voids, G phase particles, and Ni-Si rich clusters in proton irradiated dual phase 308L groove filler of a SA508–304 L dissimilar metal weldment are analyzed using advanced characterization techniques. These weldments are often used in light water nuclear reactors and are subject to enhanced corrosion and associated stress corrosion cracking (SCC). Radiation damage is known to accelerate SCC. Ni-Si enriched clusters were observed in proton irradiated γ austenite, while G phase M₆Ni₁₆Si₇ (where M transition metal element) precipitates were observed in proton irradiated δ ferrite. Compositional analysis of the G phase precipitates and Ni-Si clusters from STEM-EDS and APT are compared. Unlike G phase particles in proton irradiated δ ferrite, Ni-Si clusters in proton irradiated γ austenite are not rich in Mn. Both STEM-EDS and APT line-scan profiles of the Ni-Si clusters show that the Fe and Cr concentration gradient between matrix γ austenite and the Ni-Si clusters is not as sharp as those between matrix δ ferrite and G phase. Further, HR-STEM imaging indicates that the lattice parameter of the Ni-Si clusters is commensurate with γ austenite and the clusters do not represent the precipitation of a second phase. Our analysis demonstrates the density and volume fraction of G phase particles and the density of voids scales with proton irradiation damage and the energy to recoils.

Original language	English
Article number	154287
Journal	Journal of Nuclear Materials
Volume	577
DOIs	https://doi.org/10.1016/j.jnucmat.2023.154287
State	Published - Apr 15 2023
Externally published	Yes

Funding

This work was supported by the US Department of Energy Nuclear Energy University Programs under contract No. DE NE0008699 . The Michigan Ion Beam Laboratory was used to perform the proton irradiation exposures. The authors are grateful to Drs. G. Was and O. Toader at the University of Michigan for performing the irradiations, as well as Dr. M. Song for help with sample electropolishing. A portion of the experiments were carried out at the Materials Research Laboratory Central Research Facilities, University of Illinois. The National Science Foundation under award No. DMR 1828450 is gratefully acknowledged for the APT measurements. The authors are grateful to Dr. M. Sardela at the University of Illinois for a financial offset associated with APT data collection and analysis. This work was supported by the US Department of Energy Nuclear Energy University Programs under contract No. DE NE0008699. The Michigan Ion Beam Laboratory was used to perform the proton irradiation exposures. The authors are grateful to Drs. G. Was and O. Toader at the University of Michigan for performing the irradiations, as well as Dr. M. Song for help with sample electropolishing. A portion of the experiments were carried out at the Materials Research Laboratory Central Research Facilities, University of Illinois. The National Science Foundation under award No. DMR 1828450 is gratefully acknowledged for the APT measurements. The authors are grateful to Dr. M. Sardela at the University of Illinois for a financial offset associated with APT data collection and analysis.

Funders	Funder number
National Science Foundation	DMR 1828450
Nuclear Energy University Program	DE NE0008699
University of Illinois System

Keywords

308L groove filler
Atom probe tomography
G phase precipitation
Ni-Si clustering
Proton irradiation
SA508–304L weldment

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10.1016/j.jnucmat.2023.154287

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title = "An examination of the precipitation behavior of proton irradiated dual phase 308L weldment filler materials",

abstract = "Voids, G phase particles, and Ni-Si rich clusters in proton irradiated dual phase 308L groove filler of a SA508–304 L dissimilar metal weldment are analyzed using advanced characterization techniques. These weldments are often used in light water nuclear reactors and are subject to enhanced corrosion and associated stress corrosion cracking (SCC). Radiation damage is known to accelerate SCC. Ni-Si enriched clusters were observed in proton irradiated γ austenite, while G phase M6Ni16Si7 (where M transition metal element) precipitates were observed in proton irradiated δ ferrite. Compositional analysis of the G phase precipitates and Ni-Si clusters from STEM-EDS and APT are compared. Unlike G phase particles in proton irradiated δ ferrite, Ni-Si clusters in proton irradiated γ austenite are not rich in Mn. Both STEM-EDS and APT line-scan profiles of the Ni-Si clusters show that the Fe and Cr concentration gradient between matrix γ austenite and the Ni-Si clusters is not as sharp as those between matrix δ ferrite and G phase. Further, HR-STEM imaging indicates that the lattice parameter of the Ni-Si clusters is commensurate with γ austenite and the clusters do not represent the precipitation of a second phase. Our analysis demonstrates the density and volume fraction of G phase particles and the density of voids scales with proton irradiation damage and the energy to recoils.",

keywords = "308L groove filler, Atom probe tomography, G phase precipitation, Ni-Si clustering, Proton irradiation, SA508–304L weldment",

author = "Zhen Li and Xun Zhan and Waclaw Swiech and Honghui Zhou and Weicheng Zhong and Sutton, {Benjamin J.} and Romnes, {Carly J.} and Patel, {Dhruval K.} and Shah, {Nachiket S.} and Heuser, {Brent J.}",

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doi = "10.1016/j.jnucmat.2023.154287",

language = "English",

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T1 - An examination of the precipitation behavior of proton irradiated dual phase 308L weldment filler materials

AU - Li, Zhen

AU - Zhan, Xun

AU - Swiech, Waclaw

AU - Zhou, Honghui

AU - Zhong, Weicheng

AU - Sutton, Benjamin J.

AU - Romnes, Carly J.

AU - Patel, Dhruval K.

AU - Shah, Nachiket S.

AU - Heuser, Brent J.

PY - 2023/4/15

Y1 - 2023/4/15

N2 - Voids, G phase particles, and Ni-Si rich clusters in proton irradiated dual phase 308L groove filler of a SA508–304 L dissimilar metal weldment are analyzed using advanced characterization techniques. These weldments are often used in light water nuclear reactors and are subject to enhanced corrosion and associated stress corrosion cracking (SCC). Radiation damage is known to accelerate SCC. Ni-Si enriched clusters were observed in proton irradiated γ austenite, while G phase M6Ni16Si7 (where M transition metal element) precipitates were observed in proton irradiated δ ferrite. Compositional analysis of the G phase precipitates and Ni-Si clusters from STEM-EDS and APT are compared. Unlike G phase particles in proton irradiated δ ferrite, Ni-Si clusters in proton irradiated γ austenite are not rich in Mn. Both STEM-EDS and APT line-scan profiles of the Ni-Si clusters show that the Fe and Cr concentration gradient between matrix γ austenite and the Ni-Si clusters is not as sharp as those between matrix δ ferrite and G phase. Further, HR-STEM imaging indicates that the lattice parameter of the Ni-Si clusters is commensurate with γ austenite and the clusters do not represent the precipitation of a second phase. Our analysis demonstrates the density and volume fraction of G phase particles and the density of voids scales with proton irradiation damage and the energy to recoils.

AB - Voids, G phase particles, and Ni-Si rich clusters in proton irradiated dual phase 308L groove filler of a SA508–304 L dissimilar metal weldment are analyzed using advanced characterization techniques. These weldments are often used in light water nuclear reactors and are subject to enhanced corrosion and associated stress corrosion cracking (SCC). Radiation damage is known to accelerate SCC. Ni-Si enriched clusters were observed in proton irradiated γ austenite, while G phase M6Ni16Si7 (where M transition metal element) precipitates were observed in proton irradiated δ ferrite. Compositional analysis of the G phase precipitates and Ni-Si clusters from STEM-EDS and APT are compared. Unlike G phase particles in proton irradiated δ ferrite, Ni-Si clusters in proton irradiated γ austenite are not rich in Mn. Both STEM-EDS and APT line-scan profiles of the Ni-Si clusters show that the Fe and Cr concentration gradient between matrix γ austenite and the Ni-Si clusters is not as sharp as those between matrix δ ferrite and G phase. Further, HR-STEM imaging indicates that the lattice parameter of the Ni-Si clusters is commensurate with γ austenite and the clusters do not represent the precipitation of a second phase. Our analysis demonstrates the density and volume fraction of G phase particles and the density of voids scales with proton irradiation damage and the energy to recoils.

KW - 308L groove filler

KW - Atom probe tomography

KW - G phase precipitation

KW - Ni-Si clustering

KW - Proton irradiation

KW - SA508–304L weldment

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SN - 0022-3115

VL - 577

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 154287

ER -

An examination of the precipitation behavior of proton irradiated dual phase 308L weldment filler materials

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