Skip to main content Accessibility help

Dynamically recrystallized austenitic grain in a low carbon advanced ultra-high strength steel (A-UHSS) microalloyed with boron under hot deformation conditions

  • I. Mejía (a1), E. García-Mora (a1), G. Altamirano (a1), A. Bedolla-Jacuinde (a1) and J. M. Cabrera (a2) (a3)...

This research work studies the dynamically recrystallized austenitic grain size (D rec) in a new family of low carbon NiCrCuV advanced ultra-high strength steel (A-UHSS) microalloyed with boron under hot deformation conditions. For this purpose, uniaxial hot-compression tests are carried out in a low carbon A-UHSS microalloyed with different amounts of boron (14, 33, 82, 126 and 214 ppm) over a wide range of temperatures (950, 1000, 1050 and 1100°C) and constant true strain rates (10−3, 10−2 and 10−1 s−1). Deformed samples are prepared and chemically etched with a saturated aqueous picric acid solution at 80°C in order to reveal the D rec and examined by light optical (LOM) and scanning electron microscopy (SEM). The D rec is related to the Zener-Hollomon parameter (Z), and thereafter the D rec divided by Burger's vector (b) is related to the steady state stress (σ ss) divided by the shear modulus (µ) (Derby model). Results shown that the D rec in the current steels is fine (≈ 23 μm) and almost equiaxed, and the recrystallized grain size-flow stress relationship observed after of plastic deformation is consistent with the general formulation proposed by Derby. It is corroborated that boron additions to the current A-UHSS do not have meaningful influence on the D rec.

Hide All
1. Committee on Automotive Applications, International Iron & Steel Institute, Advanced High Strength Steel Application Guidelines 1–9 (2006).
2. Jiang, H. T., Tang, D. and Mi, Z. L., J. Iron Steel Res. 19, 16 (2007).
3. Taylor, K. A. and Hansen, S. S., Metall. Mater. Trans. A21, 16971708 (1991).
4. Tameiro, H., Murata, M., Habu, R. and Nagumo, M., Trans. Iron Steel Inst. Jpn. 27, 120129 (1987).
5. Morral, J. E. and Cameron, T. B., in Boron in Steel edited by Banerji, S. K. and Morral, J. E., (The Metallurgical Society of AIME, Milwaukee, USA, 1980) pp. 1932.
6. Habu, R., Miyata, M., Sekino, S. and Goda, S., Trans. Iron Steel Inst. Jpn. 18, 492500 (1978).
7. Werner, D. H., Boron and Boron Containing Steels, 2nd ed. (Verlag Stahl Eisen, Dusseldorf, 1995) pp. 1520.
8. Kapadia, B. M., J. Heat Treat. 5, 4153 (1987).
9. Heckmann, C. J., Ormston, D., Grimpe, F., Hillenbrand, H. G. and Jansen, J. P., Ironmaking Steelmaking 32, 337341 (2005).
10. Jun, H. J., Kang, J. S., Seo, D. H., Kang, K. B. and Park, C. G., Mater. Sci. Eng. A422, 157162 (2006).
11. Kagechika, H., ISIJ Int. 47, 773794 (2007).
12. Wang, X. M. and He, X. L., ISIJ Int. 42, 3846 (2002).
13. Ohmori, Y. and Yamanaka, K., in Boron in Steels edited by Banerji, S. K. and Morral, J. E., (Metall. Soc. AIME, New York, 1980) pp. 4460.
14. Sakai, T. and Jonas, J.J., Acta Metall. 32, 189 (1984).
15. Humphreys, F.J. and Hatherly, M., Recrystallization and Related Annealing Phenomena, (Pergamon Press, Oxford, 1995).
16. Derby, B. and Ashby, M. F., Scripta Metall. 21, 879884 (1987).
17. Derby, B., Acta Metall. 39, 955962 (1991).
18. Derby, B., Scripta Metall. Mater. 27, 15811586 (1992).
19. McQueen, H. J., Yue, S., Ryan, N. D. and Fry, E., J. Mater. Process. Technol. 53, 293310 (1995).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed