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Título: | Pinning Forces Exerted by TiN Particles in Austenite of Structural Steels and Comparison with Driving Forces for Grain Growth and for Static Recrystallisation |
Autor: | Chaves, J. I.; Medina, Sebastián F. CSIC ORCID; Gómez, Manuel CSIC ORCID; Rancel, Lucía; Valles, P. | Palabras clave: | Driving force Hot rolling simulation, Pinning force TiN Precipitates |
Fecha de publicación: | 2007 | Editor: | Trans Tech Publications | Citación: | Materials Science Forum 550 : 405-410 (2007) | Resumen: | In this work the pinning forces exerted by TiN particles in the austenitic phase in two Ti microalloyed steels have been determined and compared with the driving forces for austenite grain growth and for static recrystallisation between hot rolling passes, respectively. TiN precipitate sizes were measured by transmission electron microscopy (TEM) and the precipitated volumes were calculated. These results were then used to calculate pinning forces. The driving forces for recrystallisation were found to be approximately two orders of magnitude higher than the pinning forces, which explains why the austenite in these steels barely experiences hardening during rolling and why the accumulated stress prior to the austenite→ferrite transformation is insufficient (low dislocation density) to refine the ferritic grain. | Versión del editor: | http://dx.doi.org/10.4028/www.scientific.net/MSF.550.405 | URI: | http://hdl.handle.net/10261/56385 | DOI: | 10.4028/www.scientific.net/MSF.550.405 | ISSN: | 0255-5476 |
Aparece en las colecciones: | (CENIM) Artículos |
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