Comparison of Performance and Oxidation of Nitronic-50 and Stainless Steel 316 in Subcritical and Supercritical Water Environments
| Autor: | Dev Chidambaram, Zachary Karmiol |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Austenite
Materials science 020209 energy Spinel Metallurgy Metals and Alloys chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Nitrogen Supercritical fluid symbols.namesake X-ray photoelectron spectroscopy chemistry Mechanics of Materials 0202 electrical engineering electronic engineering information engineering symbols engineering Slow strain rate testing Austenitic stainless steel 0210 nano-technology Raman spectroscopy |
| Zdroj: | Metallurgical and Materials Transactions A. 47:2498-2508 |
| ISSN: | 1543-1940 1073-5623 |
| Popis: | This work investigates two austenitic stainless steels, Nitronic-50 and stainless steel 316, for use in both subcritical and supercritical water (SCW) conditions. The mechanical characteristics of the materials were investigated using slow strain rate testing in a SCW test loop under the following conditions: nitrogen at ambient temperature and pressure, liquid water at 473 K (200 °C) and 8 MPa, liquid water at 573 K (300 °C) and 15 MPa, and SCW at 698 K (425 °C) and 27 MPa. The surfaces of the failed samples were characterized using Raman spectroscopy, and X-ray photoelectron spectroscopy. Nitronic-50 was found to have superior mechanical strength characteristics at all conditions compared to stainless steel 316. At all elevated temperature conditions, stainless steel 316 was found to have a surface film consisting of iron oxides, while the surface film of Nitronic-50 predominantly consisted of nickel-iron spinel. |
| Databáze: | OpenAIRE |
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