Deformation mechanisms in meta-stable and nitrogen-stabilized austenitic stainless steel during severe surface deformation
| Autor: | Grethe Winther, Bo Wang, Marcel A. J. Somers, Chuanshi Hong, Thomas Lundin Christiansen |
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| Rok vydání: | 2020 |
| Předmět: |
AISI 304L stainless steel
Materials science Austenitic nanocrystallites 0211 other engineering and technologies 02 engineering and technology engineering.material Deformation (meteorology) 01 natural sciences Stacking-fault energy High-temperature solution nitriding 0103 physical sciences General Materials Science Austenitic stainless steel Composite material Surface roller burnishing 021102 mining & metallurgy 010302 applied physics Austenite Deformation-induced martensitic transformation Strain rate Roller burnishing 021001 nanoscience & nanotechnology Deformation mechanism Martensite engineering 0210 nano-technology |
| Zdroj: | Materialia Wang, B, Hong, C, Winther, G, Christiansen, T L & Somers, M A J 2020, ' Deformation mechanisms in meta-stable and nitrogen-stabilized austenitic stainless steel during severe surface deformation ', Acta Materialia, vol. 12, 100751 . https://doi.org/10.1016/j.mtla.2020.100751 |
| ISSN: | 2589-1529 |
| DOI: | 10.1016/j.mtla.2020.100751 |
| Popis: | AISI 304L stainless steel in austenitized and in solution nitrided condition was severely mechanically deformed by surface roller burnishing. High-temperature solution nitriding was applied to achieve a nitrogen-concentration depth profile, leading to a depth-gradient in the austenite stability. X-ray diffraction, electron microscopy and hardness indentation were applied for characterization of the graded microstructures obtained by combining a composition profile and a deformation profile. While severe plastic surface straining of an austenitized specimen leads to a deformation-induced transformation of austenite into martensite, the solution nitrided specimen remains austenitic upon deformation, even in the region where nanocrystallization occurs. The deformation mechanisms operable in the nitrogen-stabilized austenitic stainless steel, i.e. twinning or dislocation glide, depend on the combination of applied plastic strain/strain rate, and the nitrogen-concentration dependent stacking fault energy. |
| Databáze: | OpenAIRE |
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