Evaluation of the active mechanism for acidic SCC induced mechanical degradation: A methodological approach
| Autor: | T. De Seranno, Arne Verliefde, Kim Verbeken, Tom Depover |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Dual-phase steel Mechanical Engineering 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Oxygen Corrosion Cracking chemistry Chemical engineering Mechanics of Materials Ultimate tensile strength Degradation (geology) General Materials Science 021108 energy Stress corrosion cracking 0210 nano-technology Ductility |
| Zdroj: | Materials Science and Engineering: A. 790:139645 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2020.139645 |
| Popis: | This work evaluates the mechanical degradation of Dual Phase steel due to acidic stress-corrosion cracking (SCC). The SCC susceptibility is studied by in-situ constant extension rate testing, followed by post-mortem fractographic evaluation, while the corrosion rate is determined by electrochemical measurements. Elevating the temperature results in a decrease in both strength and ductility. Organic acids addition further leads to a significant ductility loss, whereas oxygen removal yields a ductility gain. The corrosion rate shows a linear relationship with the H+ concentration. Between a pH of 4.2–7, anodic dissolution occurs, whereas hydrogen absorption takes place at lower pH, causing hydrogen-assisted stress-corrosion cracks. |
| Databáze: | OpenAIRE |
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