Evaluation of 475 °C embrittlement in UNS S32750 super duplex stainless steel using four-point electric conductivity measurements
| Autor: | Víctor H. López-Morelos, A. Medina-Flores, Alberto Ruiz, Gildardo Gutiérrez-Vargas, J. González-Sánchez, Jin-Yeon Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Toughness
Materials science 020209 energy 02 engineering and technology Conductivity Indentation hardness 030218 nuclear medicine & medical imaging Corrosion 03 medical and health sciences 0302 clinical medicine Electric conductivity Electrical resistivity and conductivity Nondestructive testing 0202 electrical engineering electronic engineering information engineering Composite material Embrittlement 475 °C embrittlement business.industry TK9001-9401 Microstructure Nuclear Energy and Engineering Localized corrosion Nuclear engineering. Atomic power Duplex stainless steel business Alternating current potential drop |
| Zdroj: | Nuclear Engineering and Technology, Vol 53, Iss 9, Pp 2982-2989 (2021) |
| ISSN: | 1738-5733 |
| Popis: | One of the consequences of the 475 °C embrittlement of duplex stainless steels is the reduction of the resistance to localized corrosion. Therefore, the detection of this type of embrittlement before the material exhibits significant loss in toughness, and corrosion resistance is important to ensure the structural integrity of critical components under corrosion threats. In this research, conductivity measurements are performed using the alternating current potential drop (ACPD) technique with using a portable four-point probe as a nondestructive evaluation (NDE) method for detecting the embrittlement in a 2507 (UNS S32750) super duplex stainless steel (SDSS) aged at 475 °C from as-received condition to 300 h. The electric conductivity results were compared against two electrochemical tests namely double loop electrochemical potentiokinetic reactivation (DL-EPR) and critical pitting temperature (CPT). Mechanical tests and the microstructure characterized using scanning electron microscopy (SEM) imaging are conducted to track the progress of embrittlement. It is shown that the electric conductivity correlates with the changes in impact energy, microhardness, and CPT corrosion tests result demonstrating the feasibility of the four-point probe as a possible field-deployable method for evaluating the 475 °C embrittlement of 2507 SDSS. |
| Databáze: | OpenAIRE |
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