Abstract
Mn distribution and austenite morphology at the early stage of intercritical annealing of 5Mn steel were investigated. It was experimentally demonstrated that a newly formed 20 nm-thick austenite was formed without the partitioning of Mn. The elemental analysis confirmed that the growth of austenite should be controlled by the diffusion of C prior to the diffusion of Mn at a low heating rate. The austenite growth started under negligible-partitioning local equilibrium mode and then switched to partitioning local equilibrium mode. Mn segregation at the γ/α interface suggested that the collector plate mechanism was the essential way of Mn partitioning at the early stage of austenite growth.
Similar content being viewed by others
References
R. Miller, Metall. Trans. 3 (1972) 905–912.
W. Zhan, L. Q. Cao, J. Hu, W. Q. Cao, J. Li, H. Dong, J. Iron Steel Res. Int. 21 (2014) No.5, 551–558.
G. Speich, V. Demarest, R. Miller, Metall. Trans. A 12 (1981) 1419–1428.
W. Cao, C. Wang, J. Shi, M. Wang, W. Hui, H. Dong, Mater. Sci. Eng. A 528 (2011) 6661–6666.
J. Shi, X. Sun, M. Wang, W. Hui, H. Dong, W. Cao, Scripta Mater. 63 (2010) 815–818.
C. Wang, J. Shi, C.Y. Wang, W. J. Hui, M. Q. Wang, H. Dong, W. Q. Cao, ISIJ Int. 51 (2011) 651–656.
A. Arlazarov, M. Gouné, O. Bouaziz, A. Hazotte, G. Petitgand, P. Barges, Mater. Sci. Eng. A 542 (2012) 31–39.
C. Garcia, A. DeArdo, Metall. Trans. A 12 (1981) 521–530.
M. J. Merwin, Mater. Sci. Forum. 539 (2007) 4327–4332.
H. Luo, J. Shi, C. Wang, W. Cao, X. Sun, H. Dong, Acta Mater. 59 (2011) 4002–4014.
E. De Moor, D. K. Matlock, J. G. Speer, M. J. Merwin, Scripta Mater. 64 (2011) 185–188.
S. Lee, S. J. Lee, B. C. De Cooman, Scripta Mater. 65 (2011) 225–228.
S. J. Lee, S. Lee, B. C. De Cooman, Scripta Mater. 64 (2011) 649–652.
W. Kaluba, R. Taillard, J. Foct, Acta Mater. 46 (1998) 5917–5927.
S. Matsuda, Y. Okamura, Trans. Iron Steel Inst. Jpn. 14 (1974) 363–368.
X. L. Cai, A. Garratt-Reed, W. Owen, Metall. Trans. A 16 (1985) 543–557.
R. Wei, M. Enomoto, R. Hadian, H. Zurob, G. Purdy, Acta Mater. 61 (2013) 697–707.
J. Han, Y. K. Lee, Acta Mater. 67 (2014) 354–361.
A. K. De, D. C. Murdock, M. C. Mataya, J. G. Speer, D. K. Matlock, Scripta Mater. 50 (2004) 1445–1449.
H. Aaron, H. I. Aaronson, Acta Metall. 16 (1968) 789–798.
M. Enomoto, H. I. Aaronson, Metall. Trans. A 18 (1987) 1547–1557.
Author information
Authors and Affiliations
Corresponding authors
Additional information
Foundation Item: Item Sponsored by National Basic Research Program of China (2010CB630800, 2015CB921700); National Natural Science Foundation of China (51001064, 51471096); Specialized Research Fund for the Doctoral Program of Higher Education of China (20100002120047); Tsinghua University Initiative Scientific Research Program (20141081200)
Rights and permissions
About this article
Cite this article
Luo, Xn., Zhong, Xy., Luo, Hw. et al. Mn Diffusion at Early Stage of Intercritical Annealing of 5Mn Steel. J. Iron Steel Res. Int. 22, 1015–1019 (2015). https://doi.org/10.1016/S1006-706X(15)30105-9
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1016/S1006-706X(15)30105-9