On the role of nitrogen on hydrogen environment embrittlement of high-interstitial austenitic CrMnC(N) steels
| Autor: | Gero Egels, Sebastian Weber, Robert Fussik, Werner Theisen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Austenite
Materials science Hydrogen Renewable Energy Sustainability and the Environment Metallurgy Alloy Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Slip (materials science) Intergranular corrosion engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Fuel Technology chemistry engineering Austenitic stainless steel 0210 nano-technology Embrittlement Hydrogen embrittlement |
| Zdroj: | International Journal of Hydrogen Energy. 44:32323-32331 |
| ISSN: | 0360-3199 |
| Popis: | This work investigates the susceptibility of high-interstitial CrMn austenitic stainless steel CN0.96 to hydrogen environment embrittlement. In this context, an N-free model alloy of CN0.96 steel was designed, produced, and characterized. Both steels were subjected to tensile tests in air and in a high-pressure hydrogen gas atmosphere. Both steels undergo severe hydrogen embrittlement. The CN0.96 steel shows trans- and intergranular failure in hydrogen, whereas the N-free model alloy shows exclusively intergranular failure. The different failure modes could be related to different deformation modes that are induced by the presence or absence of N, respectively. In the CN0.96 steel, N promotes planar dislocation slip. Due to the absence of N in the model alloy, localized slip is less pronounced and mechanical twinning is a more preferred deformation mechanism. The embrittlement of the model alloy could therefore be related to mechanisms that are known from hydrogen embrittlement of twinning-induced plasticity steels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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