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

被引：2
|
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.
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页数：13
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