Control of the Austenite recrystallization in Niobium Microalloyed steels
- Author
- Stephanie Vervynckt (UGent) , Kim Verbeken (UGent) , Philippe Thibaux, Martin Liebeherr and Yvan Houbaert (UGent)
- Organization
- Abstract
- The use of heavy gauge steel sheets for structural applications very often requires a combination of high yield strength and adequate toughness. The most cost effective way to realize a high yield strength and a high ductility in a low alloyed steel is grain refinement. In industrial practice, this refinement is realized by controlled processing. This process consists of controlling the slab reheating temperature, applying a large amount of hot deformation below the nonrecrystallization temperature (T-nr) and accelerated cooling. A better knowledge of T-nr could optimize the process and the best mechanical properties could be reached against the lowest cost. T-nr can be raised by the addition of microalloying elements such as Nb. Nb can retard the static recrystallization of austenite at low temperatures either by solute drag or by precipitation pinning. In this study, the recrystallization behavior of five Nb-microalloyed model alloys with various Nb contents, was evaluated by double hit compression tests. Further, the precipitation state of the materials was investigated experimentally by Inductively Couples Mass Spectroscopy and X-ray Diffraction. The construction of recrystallization-time-temperature diagrams and precipitation-time-temperature diagrams showed that both mechanisms, i.e. recrystallization and precipitation, strongly influence each other.
- Keywords
- double deformation, precipitation, SOLUTE, Recrystallization, INDUCED PRECIPITATION, Nb microalloyed steels
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-1843564
- MLA
- Vervynckt, Stephanie, et al. “Control of the Austenite Recrystallization in Niobium Microalloyed Steels.” Materials Science Forum, edited by T Chandra et al., vol. 638–642, Trans Tech, 2010, pp. 3567–72, doi:10.4028/www.scientific.net/MSF.638-642.3567.
- APA
- Vervynckt, S., Verbeken, K., Thibaux, P., Liebeherr, M., & Houbaert, Y. (2010). Control of the Austenite recrystallization in Niobium Microalloyed steels. In T. Chandra, N. Wanderka, W. Reimers, & M. Ionescu (Eds.), Materials Science Forum (Vol. 638–642, pp. 3567–3572). https://doi.org/10.4028/www.scientific.net/MSF.638-642.3567
- Chicago author-date
- Vervynckt, Stephanie, Kim Verbeken, Philippe Thibaux, Martin Liebeherr, and Yvan Houbaert. 2010. “Control of the Austenite Recrystallization in Niobium Microalloyed Steels.” In Materials Science Forum, edited by T Chandra, N Wanderka, W Reimers, and M Ionescu, 638–642:3567–72. Stafa-Zürich, Switzerland: Trans Tech. https://doi.org/10.4028/www.scientific.net/MSF.638-642.3567.
- Chicago author-date (all authors)
- Vervynckt, Stephanie, Kim Verbeken, Philippe Thibaux, Martin Liebeherr, and Yvan Houbaert. 2010. “Control of the Austenite Recrystallization in Niobium Microalloyed Steels.” In Materials Science Forum, ed by. T Chandra, N Wanderka, W Reimers, and M Ionescu, 638–642:3567–3572. Stafa-Zürich, Switzerland: Trans Tech. doi:10.4028/www.scientific.net/MSF.638-642.3567.
- Vancouver
- 1.Vervynckt S, Verbeken K, Thibaux P, Liebeherr M, Houbaert Y. Control of the Austenite recrystallization in Niobium Microalloyed steels. In: Chandra T, Wanderka N, Reimers W, Ionescu M, editors. Materials Science Forum. Stafa-Zürich, Switzerland: Trans Tech; 2010. p. 3567–72.
- IEEE
- [1]S. Vervynckt, K. Verbeken, P. Thibaux, M. Liebeherr, and Y. Houbaert, “Control of the Austenite recrystallization in Niobium Microalloyed steels,” in Materials Science Forum, Berlin, Germany, 2010, vol. 638–642, pp. 3567–3572.
@inproceedings{1843564, abstract = {{The use of heavy gauge steel sheets for structural applications very often requires a combination of high yield strength and adequate toughness. The most cost effective way to realize a high yield strength and a high ductility in a low alloyed steel is grain refinement. In industrial practice, this refinement is realized by controlled processing. This process consists of controlling the slab reheating temperature, applying a large amount of hot deformation below the nonrecrystallization temperature (T-nr) and accelerated cooling. A better knowledge of T-nr could optimize the process and the best mechanical properties could be reached against the lowest cost. T-nr can be raised by the addition of microalloying elements such as Nb. Nb can retard the static recrystallization of austenite at low temperatures either by solute drag or by precipitation pinning. In this study, the recrystallization behavior of five Nb-microalloyed model alloys with various Nb contents, was evaluated by double hit compression tests. Further, the precipitation state of the materials was investigated experimentally by Inductively Couples Mass Spectroscopy and X-ray Diffraction. The construction of recrystallization-time-temperature diagrams and precipitation-time-temperature diagrams showed that both mechanisms, i.e. recrystallization and precipitation, strongly influence each other.}}, author = {{Vervynckt, Stephanie and Verbeken, Kim and Thibaux, Philippe and Liebeherr, Martin and Houbaert, Yvan}}, booktitle = {{Materials Science Forum}}, editor = {{Chandra, T and Wanderka, N and Reimers, W and Ionescu, M}}, issn = {{0255-5476}}, keywords = {{double deformation,precipitation,SOLUTE,Recrystallization,INDUCED PRECIPITATION,Nb microalloyed steels}}, language = {{eng}}, location = {{Berlin, Germany}}, pages = {{3567--3572}}, publisher = {{Trans Tech}}, title = {{Control of the Austenite recrystallization in Niobium Microalloyed steels}}, url = {{http://doi.org/10.4028/www.scientific.net/MSF.638-642.3567}}, volume = {{638-642}}, year = {{2010}}, }
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