Dynamic deformation of metastable austenitic stainless steels at the nanometric length scale
Cyclic indentation was used to evaluate the dynamic deformation on metastable steels, particularly in an austenitic stainless steel, AISI 301LN. In this work, cyclic nanoindentation experiments were carried out and the obtained loading-unloading (or P-h) curves were analyzed in order to get a deeper...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/125795 |
| Acceso en línea: | https://hdl.handle.net/2117/125795 https://dx.doi.org/10.1007/s11661-018-4911-x |
| Access Level: | acceso abierto |
| Palabra clave: | Stainless steel Transmission electron microscopy metastable stainless steels cyclic nanoindentation tests transmission electron microscopy time-dependent plastic deformation ratcheting effect Acer inoxidable Àrees temàtiques de la UPC::Enginyeria dels materials |
| Sumario: | Cyclic indentation was used to evaluate the dynamic deformation on metastable steels, particularly in an austenitic stainless steel, AISI 301LN. In this work, cyclic nanoindentation experiments were carried out and the obtained loading-unloading (or P-h) curves were analyzed in order to get a deeper knowledge on the time-dependent behavior, as well as the main deformation mechanisms. It was found that the cyclic P-h curves present a softening effect due to several repeatable features (pop-in events, ratcheting effect, etc.) mainly related to dynamic deformation. Also, observation by transmission electron microscopy highlighted that dislocation pile-up is the main responsible of the secondary pop-ins produced after certain cycles. |
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