Kinetics, Mechanism and Modeling of Microstructural Evolution during Dynamic Recrystallization in a 15Cr-15Ni-2.2Mo-Ti Modified Austenitic Stainless Steel

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Kinetics, mechanism and modeling of the microstructural evolution of a 15Cr-15Ni- 2.2Mo-0.3Ti modified austenitic stainless steel (alloy D9) during dynamic recrystallization (DRX) have been investigated. The kinetics of DRX has been investigated employing a modified Johnson- Mehl-Avrami-Kolmogorov (JMAK) model. The microstructural study shows that nucleation of new grains during DRX takes place on the parent grain boundary by a bulging mechanism. No significant texture component has been found to develop in the recrystallized matrix. A substantial amount of twins have been observed in the recrystallized matrix. It is proposed that twins play an important role during the nucleation and subsequent expansion of DRX in alloy D9, which in turn moderates the texture in the recrystallized matrix. An artificial neural network model has also been developed to predict the fraction of DRX and grain size, as a function of processing conditions. A good correlation between experimental findings and predicted results has been obtained.

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Edited by:

P. B. Prangnell and P. S. Bate

Pages:

601-606

Citation:

S. Mandal et al., "Kinetics, Mechanism and Modeling of Microstructural Evolution during Dynamic Recrystallization in a 15Cr-15Ni-2.2Mo-Ti Modified Austenitic Stainless Steel", Materials Science Forum, Vol. 550, pp. 601-606, 2007

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July 2007

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[1] S. Venkadesan, P.V. Sivaprasad, C. Narayanan and V. Shanmugam: Proc. Internatl. Conf. on Stainless Steels INCOSS-89, Ind. Inst. Metals, Bombay, Feb. 1989. (Eds. P. Krishna Rao et al. ), Omega Scientific Publishers, New Delhi, (1992) p.345.

[2] Y. Weiping, R.L. Gall and G. Saindrenan: Mater. Sci. and Engg. A Vol. 332 (2002), p.41.

[3] M. Wahabi, J.M. Cabrera and J.M. Prado: Mater. Sci. and Engg. A Vol. 343 (2003), p.116.

[4] P.V. Sivaprasad, S.L. Mannan, Y.V.R.K. Prasad and R.C. Chaturvedi: Mater. Sci. Technol. Vol. 17 (2002), p.545.

[5] T. Sakai and J.J. Jonas: Acta Metal. Vol. 32 (1984), p.189.

[6] D. Ponge and G. Gottstein: Acta Mater. Vol. 46 (1998), p.69.

[7] E. Brunger, X. Wang and G. Gottstein: Scripta Mater. Vol. 38 (1998), p.1843.

[8] M. Hasegawa, M. Yamamoto and H. Fukutomi: Acta Mater. Vol. 51 (2003), p.3939.

[9] M. Hasegawa and H. Fukutomi: Mater. Trans. Vol. 43 (2002), p.2243.

[10] G. Gottstein: Acta Metal. Vol. 32 (1984), p.1117 (b) 10 20 30 40 50 60 0. 00 0. 05 0. 10 0. 15 0. 20 Relative frequency Misorientation angle (0 ) Misorientation distribution plot (a).

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