Effect of Austenitising and Deformation Temperatures on Dynamic Recrystallisation in Nb-Ti Microalloyed Steel

Abstract:

An investigation into the influence of the reheat temperature and the austenite deformation temperature on Nb precipitation and recrystallisation kinetics was carried out for a steel containing 0.081C–0.021Ti–0.064Nb (wt. %). Thermo-mechanical processing was carried out using a Gleeble 3500 simulator. The austenite grain structure was correlated to the dispersive properties of Nb atom clustering and precipitation. Irrespective of the reheat temperature, deformation to 0.75 strain at 1075 °C produced a fully recrystallised austenitic microstructure. After deformation at 975 °C, only partial recrystallisation was observed in the samples reheated to the higher temperature, whereas samples reheated to the lower temperature were fully recrystallised. The influence of solute drag and particle pinning effects on the recrystallisation rate is discussed.

• Periodical: Materials Science Forum (Volume 753)
• Pages: 431-434
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.753.431
• Online since: March 2013
• Authors: Andrii G. Kostryzhev, Abdullah Al Shahrani, Chen Zhu, Simon P. Ringer, Elena V. Pereloma
• Keywords: Microalloyed Steel, Precipitation, Recrystallization, Thermo-Mechanical Processing

References

[1] B. Dutta and C. M. Sellars, Materials Science and Technology, 3 (1987) 197-206.

[2] S. Vervynckt, K. Verbeken, P. Thibaux, Y. Houbaert, Materials Science and Engineering A, 528 (2011) 5519 - 5528.

DOI: 10.1016/j.msea.2011.03.087

[3] H.S. Zurob, G. Zhu, S.V. Subramanian, G.R. Purdy, C.R. Hutchinson and Y. Brechet, ISIJ Int., 45 (2005) 713 – 722.

DOI: 10.2355/isijinternational.45.713

[4] C.R. Hutchinson, H.S. Zurob, C.W. Sinclair and Y.J.M. Brechet, Scripta Materialia, 59 (2008) 635 - 637.

DOI: 10.1016/j.scriptamat.2008.05.036

[5] C.L. Miao, C.J. Shang, H.S. Zurob, G.D. Zhang, and S.V. Subramanian, Metallurgical and Materials Transactions A, 43A (2012) 665 - 676.

[6] A. J. DeArdo, International Materials Reviews, 48 (2003)371 - 402.

[7] B. Dutta, E.J. Palmiere and C. M. Sellars, Acta Materialia 49 (2001) 785–794.

[8] Y. Xu, Y. Yu, X. Liu and G. Wang, Journal of Material Science and Technology, 22 (2006) 149 – 152.

[9] S. G. Hong, K.B. Kang and C.G. Park, Scripta Materialia, 46 (2002) 163 – 168.

[10] S. Okaguchi and T. Hashimo, ISIJ International, 32 (1992) 283-290.

[11] Y. Zeng and W. Wang, Journal of Material Science, 43 (2008) 874-882.

[12] J.-S. Park, Y.-S. Ha, S.-J. Lee and Y.-K. Lee, Metallurgical and Materials Transactions A, 40A (2009) 560 – 568.

[13] L. Yao, J.M. Cairney, C. Zhu and S.P. Ringer, Ultramicroscopy, 111 (2011) 648-651.

[14] B.G. Gault, M.P. Moody, J.M. Cairney, S.P. Ringer, Atom probe microscopy, Springer, 2012.