Bainitic ferrite plate thickness evolution in two nanostructured steels
Bainitic ferrite plate thickness evolution during isothermal transformation was followed at the same holding temperatures in two nanostructured steels containing (in wt.%) 1C‐2Si and 0.4C‐ 3Si. A dynamic picture of how the bainitic transformation evolves was obtained from the character-ization of th...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2021 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/257784 |
| Acesso em linha: | http://hdl.handle.net/10261/257784 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Bainite Transformation kinetics Retained austenite Plate thickness |
| Resumo: | Bainitic ferrite plate thickness evolution during isothermal transformation was followed at the same holding temperatures in two nanostructured steels containing (in wt.%) 1C‐2Si and 0.4C‐ 3Si. A dynamic picture of how the bainitic transformation evolves was obtained from the character-ization of the microstructure present at room temperature after full and partial transformation at 300 and 350 °C. The continuous change during transformation of relevant parameters influencing the final scale of the microstructure, YS of austenite, driving force of the transformation and evolution of the transformation rate has been tracked, and these variations have been correlated to the evolution of the bainitic ferrite plate. Instead of the expected refinement of the plate predicted by existing theory and models, this study revealed a thickening of the bainitic ferrite plate thickness as the transformation progresses, which is partially explained by changes in the transformation rate through the whole decomposition of austenite into bainitic ferrite. |
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