Microstructural Refinement during Annealing of Plastically Deformed Austenitic Stainless Steels

Abstract:

The phenomena of strain hardening, strain induced martensite formation, recovery, martensite reversion and recrystallization have been studied in austenitic stainless steels of the AISI 304L and 316L types, after solution annealing, followed by rolling at different temperatures (-196, 25, 100 and 200°C) and subsequent annealing of the worked samples. Strain hardening and the percentage of α’ martensite formed showed strong dependency with the deformation temperature and with the austenite chemical composition. As expected, both strain hardening as well as the amount of the martensite formed was higher in the 304L steel and for lower temperatures. Reversion temperature of the α’ martensite was close to 550°C for both steels, independent of the amount of martensite. The 316L steel presented a higher resistance to recrystallization when compared to the 304L steel. The recrystallization temperature of both steels was about 150°C higher than the α’ phase reversion temperature. Rolling temperature did not influence significantly the recrystallization temperature. Proper thermal and mechanical treatments lead to interesting combinations of mechanical properties in both steels with values such as yield strength YS of about 1000 MPa, with an elongation around 10%.

• Periodical: Materials Science Forum (Volume 550)
• Pages: 423-428
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.550.423
• Online since: July 2007
• Authors: C. Herrera, Ronald Lesley Plaut, Angelo Fernando Padilha
• Keywords: Austenitic Stainless Steel, Martensite Reversion, Recovery, Recrystallization, Strain Induced Martensite

References

[1] A.F. Padilha and P.R. Rios: ISIJ International Vol. 42 (2002), p.325.

[2] A.F. Padilha, R.L. Plaut and P.R. Rios: ISIJ International Vol. 43 (2003), p.135.

[3] T.S. Byun, N. Hashimoto and K. Farrel: Acta Materialia Vol. 52 (2004), p.3889.

[4] K. Spencer, J.D. Embury, K.T. Conlon, M. Véron and M. Bréchet: Materials Science and Engineering A Vol. 387-389 (2004), p.873.

DOI: 10.1016/j.msea.2003.11.084

[5] K. Mumtaz, S. Takahashi, J. Echigoya, Y. Kamada, L.F. Zhang, H. Kikuchi, K. Ara and M. Sato: Journal of Materials Science Vol. 39 (2004), p.85.

[6] K.B. Guy, E.P. Butler and D.R.F. West: Metal Science Vol. 17 (1983), p.167.

[7] L.F.M. Martins, R.L. Plaut and A.F. Padilha: ISIJ International Vol. 38 (1998), p.572.

[8] S.S.M. Tavares, D. Fruchardt and S. Miraglia: Journal of Alloys and Compounds Vol. 307 (2000), p.311.

[9] K. Mumtaz, S. Takahashi, J. Echigoya, Y. Kamada, L.F. Zhang, H. Kikuchi, K. Ara and M. Sato: Journal of Materials Science Vol. 39 (2004), p. (1997).

[10] C. Donadille, R. Valle, P. Dervin, R. Penelle: Acta Metallurgica Vol. 37 (1989), p.1547.

[11] T. Angel: Journal of the Iron and Steel Institute Vol. 177 (1954), p.165.

[12] P. L. Mangonon, Jr. and T. Gareth: Metallurgical Transactions Vol. 1 (1970), 1587.

[13] D. T. Llewellyn: Materials Science and Technology Vol. 13 (1997), p.389.

[14] S.W. Yang and J.E. Spruiell: Journal of Materials Science Vol. 14 (1982), p.677.