Atomic scale observations of bainite transformation in a high carbon high silicon steel
A fine-scale bainitic microstructure with high strength and high toughness has been achieved by transforming austenite at 200 ºC. X-ray diffraction analysis showed the carbon concentration of these bainitic ferrite plates to be higher than expected from paraequilibrium. Atom probe tomography reveale...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2007 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/34321 |
| Acceso en línea: | http://hdl.handle.net/10261/34321 doi:10.1016/j.actamat.2006.08.033 |
| Access Level: | acceso abierto |
| Palabra clave: | Bainite transformation High silicon steel Atom probe tomography |
| Sumario: | A fine-scale bainitic microstructure with high strength and high toughness has been achieved by transforming austenite at 200 ºC. X-ray diffraction analysis showed the carbon concentration of these bainitic ferrite plates to be higher than expected from paraequilibrium. Atom probe tomography revealed that a substantial quantity of carbon was trapped at dislocations in the vicinity of the ferrite/austenite interface. These results suggest that the carbon trapping at dislocations prevents the decarburization of supersaturated bainitic ferrite and therefore alters the carbide precipitation sequence during low temperature bainite formation |
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