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

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

doi:10.1016/j.jnucmat.2023.154287

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

Journal Article · Wed Jan 18 00:00:00 EST 2023 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2023.154287· OSTI ID:2418309

^[1]; Zhan, Xun ^[2]; ^[2]; Zhou, Honghui ^[2]; ^[2]; Sutton, Benjamin J. ^[3]; ^[2]; Patel, Dhruval K. ^[2]; Shah, Nachiket S. ^[2]; Heuser, Brent J. ^[2]

Univ. of Illinois at Urbana-Champaign, IL (United States); OSTI
Univ. of Illinois at Urbana-Champaign, IL (United States)
Electric Power Research Institute, Charlotte, NC (United States)

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. Finally, 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.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Illinois at Urbana-Champaign, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)

Grant/Contract Number:: NE0008699

OSTI ID:: 2418309

Alternate ID(s):: OSTI ID: 1923715

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 577; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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