Corrosion of 316L stainless steel produced by laser powder bed fusion and powder metallurgy in pressurized water reactor primary coolant

Martin Bojinov; Litao Chang; Timo Saario; Zaiqing Que

doi:10.1016/j.mtla.2024.102055

Corrosion of 316L stainless steel produced by laser powder bed fusion and powder metallurgy in pressurized water reactor primary coolant

Martin Bojinov, Litao Chang, Timo Saario, Zaiqing Que^*

^*Corresponding author for this work

BA4509 Advanced materials for nuclear energy

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

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Abstract

Corrosion mechanism of 316 L stainless steel produced by laser powder bed fusion-hot isostatic pressing (LPBF-HIP) and powder metallurgy-hot isostatic pressing (PM-HIP) is studied with in-situ electrochemical impedance measurements coupled to detailed oxide film characterization. Quantitative analysis of impedance spectra using the Mixed-Conduction Model and estimation of local kinetic and transport parameters by interpretation of in-depth elemental composition profiles indicated lower corrosion and oxidation rates of LPBF-HIP and PM-HIP materials in comparison to conventional wrought 316 L. This owes to a higher fraction of low-angle grain boundaries, smaller grain size, the presence of nano-sized oxide particles and elevated Cr and Ni contents.

Original language	English
Article number	102055
Pages (from-to)	102055
Journal	Materialia
Volume	34
DOIs	https://doi.org/10.1016/j.mtla.2024.102055
Publication status	Published - 1 May 2024
MoE publication type	A1 Journal article-refereed

Funding

The work is funded by VTT, SINAP and UCTM. M. Bojinov acknowledges the funding from National Recovery and Resilience Plan of the Republic of Bulgaria (project No. BG-RRP-2.004-0002 “BiOrgaMCT”). L. Chang acknowledges the funding from SINAP (No. E051011031) and Innovation Funding of Shanghai Jiading District (No. E339031031). T. Saario and Z. Que acknowledge the funding from Finnish SAFER2028 (National Nuclear Safety and Waste Management Research Programme 2023-2028) LOAD project (Long-term Operation on Aging and environmental Degradation of nuclear reactor materials). The authors would like to express their gratitude for the experimental contributions of A. Toivonen, T. Lehtikuusi, S. Goel, T. Ikäläinen, J. Rantala, K. Sipilä and P. Väisänen from VTT.

Keywords

Additive manufacturing
Austenitic stainless steel
Corrosion mechanism
Hot isostatic pressing
Laser powder bed fusion
Powder metallurgy

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Corrosion of 316L stainless steel produced by laser powder bed fusion and powder metallurgy in pressurized water reactor primary coolant",

abstract = "Corrosion mechanism of 316 L stainless steel produced by laser powder bed fusion-hot isostatic pressing (LPBF-HIP) and powder metallurgy-hot isostatic pressing (PM-HIP) is studied with in-situ electrochemical impedance measurements coupled to detailed oxide film characterization. Quantitative analysis of impedance spectra using the Mixed-Conduction Model and estimation of local kinetic and transport parameters by interpretation of in-depth elemental composition profiles indicated lower corrosion and oxidation rates of LPBF-HIP and PM-HIP materials in comparison to conventional wrought 316 L. This owes to a higher fraction of low-angle grain boundaries, smaller grain size, the presence of nano-sized oxide particles and elevated Cr and Ni contents.",

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T1 - Corrosion of 316L stainless steel produced by laser powder bed fusion and powder metallurgy in pressurized water reactor primary coolant

AU - Bojinov, Martin

AU - Chang, Litao

AU - Saario, Timo

AU - Que, Zaiqing

PY - 2024/5/1

Y1 - 2024/5/1

N2 - Corrosion mechanism of 316 L stainless steel produced by laser powder bed fusion-hot isostatic pressing (LPBF-HIP) and powder metallurgy-hot isostatic pressing (PM-HIP) is studied with in-situ electrochemical impedance measurements coupled to detailed oxide film characterization. Quantitative analysis of impedance spectra using the Mixed-Conduction Model and estimation of local kinetic and transport parameters by interpretation of in-depth elemental composition profiles indicated lower corrosion and oxidation rates of LPBF-HIP and PM-HIP materials in comparison to conventional wrought 316 L. This owes to a higher fraction of low-angle grain boundaries, smaller grain size, the presence of nano-sized oxide particles and elevated Cr and Ni contents.

AB - Corrosion mechanism of 316 L stainless steel produced by laser powder bed fusion-hot isostatic pressing (LPBF-HIP) and powder metallurgy-hot isostatic pressing (PM-HIP) is studied with in-situ electrochemical impedance measurements coupled to detailed oxide film characterization. Quantitative analysis of impedance spectra using the Mixed-Conduction Model and estimation of local kinetic and transport parameters by interpretation of in-depth elemental composition profiles indicated lower corrosion and oxidation rates of LPBF-HIP and PM-HIP materials in comparison to conventional wrought 316 L. This owes to a higher fraction of low-angle grain boundaries, smaller grain size, the presence of nano-sized oxide particles and elevated Cr and Ni contents.

KW - Additive manufacturing

KW - Austenitic stainless steel

KW - Corrosion mechanism

KW - Hot isostatic pressing

KW - Laser powder bed fusion

KW - Powder metallurgy

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Corrosion of 316L stainless steel produced by laser powder bed fusion and powder metallurgy in pressurized water reactor primary coolant

Abstract

Funding

Keywords

UN SDGs

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