Microstructural Evolution of Two Medium Carbon Microalloyed Steels during Hot Forging Process

Abstract:

The main aim of the present investigation was to study the flow behaviour of two medium carbon microalloyed steels under hot forming conditions, and to analyse its microstructural evolution. The dependence of recrystallized grain size (Drec) on the Zener-Hollomon parameter Z shows a bimodal behaviour with transition from single to cyclic dynamic recrystallization. Also we observed that the variation of Drec normalized by Burgers vector (b) with sss normalized by shear modulus ( µ) shows the same bimodal behaviour cited above. The Derby’s universal equation cited in literature for recrystallized grain sizes was not followed; it seems that the presence of fine precipitated particles has a clear effect on this disagreement.

• Periodical: Materials Science Forum (Volumes 500-501)
• Pages: 155-162
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.500-501.155
• Online since: November 2005
• Authors: A. Al Omar, A. Chenaoui, Rachid Dkiouak, Jose María Cabrera, Jose Manuel Prado
• Keywords: Flow Behaviour, Hot-Forming, Microalloyed Steel, Recrystallized Grain Size

References

[1] M. Mabuchi, K. Ameyama, H. Iwasaki y K. Higashi: Acta Metall. Vol. 47 (1999), p. (2047).

[2] T. Mohri, M. Mabuchi, M. Nakamura, T. Asahina, H. Iwasaki, T. Aizawa y K. Higashi: Mater. Sci. Eng. Vol. A290 (2000), p.139.

[3] W. J. Kim, S. W. Chung, C. S. Chung y D. Kum: Acta Metall. Vol. 49 (2001), p.3337.

[4] A. Wantzen, P. Karduck y G. Gottstein: en Strength of Metals and Alloys, Proc. Conf. , ICSMA5, ed. P. Haasen y col. , Pregamon Press, Nueva York Vol. 1 (1979), p.517.

DOI: 10.1016/b978-1-4832-8412-5.50089-8

[5] L. Blaz, T. Sakai y J.J. Jonas: Metal Science Vol. 17 (1983), p.603.

[6] P.J. Gras: Metall. Trans. A Vol. 6 (1975), p.1197.

[7] H. J. Mc Queen y J.J. Jonas: Treatise on Materials Science and Technology 6, Academic press, (1975), p.394.

[8] R. J. Twiss: Pageoph Vol. 115 (1997), p.227.

[9] J. P. Poirier: en Creep of crystals, Cambridge Univ. Press. (1985).

[10] B. Derby: Scripta Metallurgica et Materialia Vol. 27 (1992), p.1581.

[11] B. Derby: Acta Metallurgica Vol. 39, nº 5 (1991), p.955.

[12] S. Sakui, T. Sakai y K. Takeishi: Trans ISIJ Vol. 17 (1977), p.718.

[13] T. Sakai y J.J. Jonas: Acta Metallurgica Vol 32, nº2 (1984), p.189.

[14] P.E. Reynolds: Ironmaking and Steelmaking Vol. 8 (1991), p.52.

[15] F.G. Wilson y T. Gladman: International Materials Review Vol. 33, nº5 (1988), p.221.

[16] O.N. Dogan, G.M. Michal y H.W. Kwon: Metall. Trans. A Vol. 23 (1992), p.2121.

[17] A. Al Omar, Doctoral Thesis, Universidad Politécnica de Cataluña, (1996).

[18] J. M. Cabrera, Doctoral Thesis, Universidad Politécnica de Cataluña, (1995).

[19] J.J. Jonas y H.J. McQueen, en Mise en forme de métaux et alliages, cap. 6, Editions du C.N. RS., Paris. (1976), p.99.

DOI: 10.51257/a-v1-m670