The Effect of Plastic Deformation on the Formation of Different Morphologies of Ferrite upon Cooling

Abstract:

Article Preview

This paper addresses the physical mechanisms of the transformation of deformed austenite into allotriomorphic ferrite and Widmanstätten ferrite. The possible implementation of deformation in currently available transformation models for allotriomorphic ferrite and Widmanstätten ferrite is discussed based on a series of deformation dilatometry experiments. It is concluded that a small amount of deformation already gives significantly faster transformation kinetics and a significant decrease in fraction Widmanstätten ferrite, and that the key to understanding the effect of deformation on transformation lies in the nucleation of allotriomorphic and Widmanstätten ferrite. For Widmanstätten ferrite also the growth needs further study.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

4572-4577

Citation:

Y. van Leeuwen and J. Sietsma, "The Effect of Plastic Deformation on the Formation of Different Morphologies of Ferrite upon Cooling", Materials Science Forum, Vols. 539-543, pp. 4572-4577, 2007

Online since:

March 2007

Export:

Price:

$38.00

[1] D.N. Hanlon, J. Sietsma and S. van der Zwaag, ISIJ International Vol. 41 (2001), p.1028.

[2] A.J. De Ardo: Conf. Proc. Accelerated Cooling of Steels, ed. By P. Southwick (AIME, Pittsburgh, PA, 1986), p.97.

[3] S.E. Offerman et. al., Science Vol. 298 (2002), p.1003.

[4] D. Phelan and R. Dippenaar, Met. & Mat. Trans. A Vol. 35A (2004), p.3701.

[5] D. Phelan, N. Stanford and R. Dippenaar, Mat. Sci. Eng. A Vol. 407 (2005), p.127.

[6] S.J. Jones and H.K.D.H. Bhadeshia, Acta Mater. Vol. 45 (1997), p.2911.

[7] T.A. Kop, Y. van Leeuwen, J. Sietsma and S. van der Zwaag, ISIJ Int. Vol. 40 (2000), p.713.

[8] J.W. Christian: The Theory of Transformations in Metals and Alloys, 2nd ed. (Pergamon Press, Oxford, 1981) p.476.

[9] M. Hillert, Jernkont Ann. Vol. 141 (1957), p.757.

[10] M. Hillert, Met. Trans. A Vol. 6A (1975), p.5.

[11] R.H. Larn and J.R. Yang, Mat. Sci. Eng. A Vol. 264 (1999), p.139.

[12] J.R. Yang and R.H. Larn, Mat. Sci. Eng. A Vol. 223 (1997), p.158.

[13] P.H. Shipway and H.K.D.H. Bhadeshia, Mat. Sci. Eng. A Vol. 223 (1997), p.179.