Hot-Working Behaviour of Advanced High-Manganese C-Mn-Si-Al Steels

Leszek Adam Dobrzański; Wojciech Borek

doi:10.4028/www.scientific.net/MSF.654-656.266

Paper Titles

Hot-Rolled TRIP Steels Based on Dynamic Transformation of Undercooled Austenite
p.250

Effect of Thermomechanical Processing Parameters on the Microstructure Development in Low Si TRIP Steel
p.254

Selective Oxidation and Sub-Surface Phase Transformation during Austenitic Annealing of TWIP Steels
p.258

Effect of N on Microstructure and Tensile Behavior of TWIP Steel
p.262

Hot-Working Behaviour of Advanced High-Manganese C-Mn-Si-Al Steels
p.266

Constitutive Modeling of TWIP Steel in Uni-Axial Tension
p.270

Development of a Robust TRIP800 Concept for GI/GA Automotive Applications
p.274

On the Stretch-Flangeability of High Mn TWIP Steels
p.278

Processing, Properties and Microstructure of a 1.2%Al TRIP Steel
p.282

HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Hot-Working Behaviour of Advanced High-Manganese...

Hot-Working Behaviour of Advanced High-Manganese C-Mn-Si-Al Steels

Abstract:

The high-manganese austenitic steels are an answer for new demands of automotive industry concerning the safety of passengers by the use of materials absorbing high values of energy during collisions. The chemical compositions of two high-manganese austenitic steels containing various Al and Si concentrations were developed. Additionally, the steels were microalloyed by Nb and Ti in order to control the grain growth under hot-working conditions. The influence of hot-working conditions on a recrystallization behaviour was investigated. Flow stresses during the multistage compression test were measured using the Gleeble 3800 thermo-mechanical simulator. To describe the hot-working behaviour, the steel was compressed to the various amount of deformation (4x0.29, 4x0.23 and 4x0.19). The microstructure evolution in successive stages of deformation was determined in metallographic investigations using light microscopy. The flow stresses are much higher in comparison with austenitic Cr-Ni and Cr-Mn steels and slightly higher compared to Fe-(15-25) Mn alloys. Making use of dynamic and metadynamic recrystallization, it is possible to refine the microstructure and to decrease the flow stress during the last deformation at 850°C. Applying the true strains of 0.23 and 0.19 requires the microstructure refinement by static recrystallization. The obtained microstructure – hot-working relationships can be useful in the determination of powerful parameters of hot-rolling and to design a rolling schedule for high-manganese steel sheets with fine-grained austenitic structures.

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Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

266-269

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.266

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Cite this paper

Online since:

June 2010

Authors:

Leszek Adam Dobrzański, Wojciech Borek

Keywords:

Dynamic Recrystallization (DRX), High-Manganese Steel, Hot-Compression Test, Hot-Working, Thermo-Mechanical Processing, TWIP Steel

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References

[1] G. Frommeyer and O. Grässel: La Revue de Metallurgie-CIT, No. 10 (1998) p.1299.

Google Scholar

[2] G. Frommeyer, U. Brüx and P. Neumann: ISIJ International, Vol. 43, No. 3 (2003) p.438.

Google Scholar

[3] S. Vercammen, B. Blanpain, B.C. De Cooman and P. Wollants: Acta Materialia, Vol. 52 (2004) p. (2005).

Google Scholar

[4] S. Allain, J.P. Chateau, O. Bouaziz, S. Migot and N. Guelton: Materials Science and Engineering A, Vols. 387-389 (2004) p.158.

DOI: 10.1016/j.msea.2004.01.059

Google Scholar

[5] O. Grässel, L. Krüger, G. Frommeyer and L.W. Meyer: International Journal of Plasticity, Vol. 16 (2000) p.1391.

Google Scholar

[6] A.S. Hamada, L.P. Karjalainen and M.C. Somani: Materials Science and Engineering A, Vol. 467 (2007) p.114.

Google Scholar

[7] G. Niewielski, M. Hetmańczyk and D. Kuc: Inżynieria Materiałowa, Vol. 24, No. 6 (2003) p.795.

Google Scholar

[8] L.A. Dobrzański, A. Grajcar and W. Borek: Journal of Achievements in Materials and Manufacturing Engineering Vol. 31, Issue 1 (2008) p.7.

Google Scholar