Effect of Deformation in Controlled Rolling on Ferrite Nucleation
| Autor: | V. M. Khlestov, H.J. McQueen, E. V. Konopleva |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Canadian Metallurgical Quarterly. 40:221-234 |
| ISSN: | 1879-1395 0008-4433 |
| DOI: | 10.1179/000844301794388425 |
| Popis: | Nucleation of ferrite either at austenite grain boundaries or within them on deformation defects has been examined experimentally and analyzed on the basis of the theory of heterogeneous nucleation. Low-carbon low-alloy steels were deformed by controlled rolling schedules to a total reduction of 50 or 68% in finish rolling at 730-800 °C. Deformation accelerates the kinetics of the γ→∞ transformation and strongly activates ferrite nucleation at grain boundaries. Both experimental and theoretical estimations showed that the rate of intragranular nucleation is much less compared to nucleation at grain boundaries. Intragranular nuclei develop notably only in the final stages of transformation in deformed austenite and affect the formation of structure only in the small separated areas.On a examine experimentalement et analyse la nucleation de la ferrite, soit aux joints de grain de l'faustenite, ou a l'finterieur de ceux-ci, aux defauts de deformation, en se basant sur la theorie de la nucleation hete... |
| Databáze: | OpenAIRE |
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