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

被引：5

作者：

Bojinov, Martin ^{[1
]}

Chang, Litao ^{[2
]}

Saario, Timo ^{[3
]}

Que, Zaiqing ^{[3
]}

机构：

[1] Univ Chem Technol & Met, Dept Phys Chem, Kl Ohridski Blvd 8, Sofia 1756, Bulgaria

[2] Chinese Acad Sci, Shanghai Inst Appl Phys SINAP, 2019 Jialuo Rd, Shanghai 201800, Peoples R China

[3] VTT Tech Res Ctr Finland, Adv Mat Nucl Energy, Kivimiehentie 3, Espoo 02150, Finland

来源：

MATERIALIA | 2024年 / 34卷

关键词：

Austenitic stainless steel; Additive manufacturing; Laser powder bed fusion; Powder metallurgy; Hot isostatic pressing; Corrosion mechanism; CRACK-GROWTH; MICROSTRUCTURE; TEMPERATURE; PARAMETERS; RESISTANCE; TOPOLOGY; BEHAVIOR;

D O I：

10.1016/j.mtla.2024.102055

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion mechanism of 316 L stainless steel produced by laser powder bed fusion-hot isostatic pressing (LPBFHIP) 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 indepth 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.

引用

页数：13

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