On Bainite Nucleation at Carbon Depleted Zone around Edge Dislocation

Abstract:

Article Preview

The maximum number of carbon atoms adsorbed at edge dislocation was calculated using a model based on Boltzmann distribution. The number of carbon atoms adsorbed by edge dislocation increases with bulk concentration increasing and temperature decreasing. When the interfacial energy was chosen as 0.2J/mol, the maximum radius of carbon depleted zone is smaller than the critical radius required for displacive nucleation at 700K, however, larger than the critical radius at 600K. Moreover, the radius of carbon depleted zone around the dislocation at 600K is larger than that at 700K. It seems that bainite may nucleate by a displacive mechanism at lower temperature.

Info:

Periodical:

Key Engineering Materials (Volumes 334-335)

Edited by:

J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang

Pages:

121-124

DOI:

10.4028/www.scientific.net/KEM.334-335.121

Citation:

S. X. Zhao et al., "On Bainite Nucleation at Carbon Depleted Zone around Edge Dislocation", Key Engineering Materials, Vols. 334-335, pp. 121-124, 2007

Online since:

March 2007

Export:

Price:

$35.00

[1] R. F. Hehemann, K. R. Kinsman and H. I. Aaronson, Metall. Trans. 3 (1972) p.1077.

[2] C. Garcia-Mateo and H. K. D. H. Bhadeshia, Mater. Sci. Eng. 378A (2004) p.289.

[3] T. Y. Hsu and M. Yiwen, Acta Metall. 32 (1984) p.1469.

[4] H. I. Aaronson, H. A. Domian and G. M. Pound, Trans. Metall. AIME 236 (1966) p.753.

[5] A. H. Cottrell and B. A. Bilby, Proc. Phys. Soc. A62 (1949) p.49.

[6] A. H. Cottrell, Dislocation and plastic flow in crystals 1956).

[7] W. J. Liu, Metall. Mater. Trans. 26A (1995) p.1641.

[8] M. Suehiro, Z. K. Liu and J. Agren, Acta Mater. 44 (1996) p.4241.

[9] L. Kaufman, S. V. Radcliffe and M. Cohen, in: Decomposition of Austenite by Diffusional Processes (1962) p.313.

[10] H. K. D. H. Bhadeshia, Mater. Sci. Technol. 1 (1985) p.497.

[11] Z. K. Liu, Acta Mater. 44 (1996) p.3855.

[12] R. H. Goodenow, S. J. Matas and R. F. Hehemann, Trans. AIMME (1963) p.651.

[13] C. Lim and M. Wutting, Acta Metall. 22 (1974) p.1215.

In order to see related information, you need to Login.