Hot deformation and recrystallization of advanced high-manganese austenitic TWIP steels

• Autorzy: Dobrzyński L A , Borek W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the paper is to determine the influence of hot-rolling conditions on structure of new-developed high-manganese austenitic steels. Design/methodology/approach: Flow stresses during continuous and multi-stage compression tests were measured using the Gleeble 3800 thermo-mechanical simulator. To describe the hot-working behaviour, the steels were compressed to the various amount of deformation (4x0.29, 4x0.23 and 4x0.19). The microstructure evolution in different stages of hot-rolling was determined in metallographic investigations using light microscopy as well as X-ray diffraction. Findings: The steels are characterized by different microstructure in the initial state. Steel with higher Al concentration has stable microstructure of austenite with annealing twins, while steel with higher Si concentration consists of certain portion of e martensite in form of plates. The flow stresses are in the range of 200-430 MPa for the applied conditions of hot-working and are up to 40 MPa lower compared to continuous compressions. Results of the multi-stage compression proved that applying the true strain 4x0.29 gives the possibility to refine the austenite microstructure as a result of dynamic recrystallization. In case of applying the lower deformations 4x0.23 and 4x0.19, the process controlling work hardening is dynamic recovery. On the basis of analysis of thermo-mechanical treatment carried out in continuous axisymetrical compression test and multi-stage compression test using the Gleeble 3800 simulator allowed to work out a schedule of three different variants of hot-rolling for each of investigated steels 26Mn-3Si-3Al-Nb-Ti and 27Mn-4Si-2Al-Nb-Ti. Research limitations/implications: To fully describe the hot-rolling behaviour of the new-developed steels, further investigations in wider temperature and strain rate ranges are required. Practical implications: Various conditions of hot-rolling for advanced high-manganese austenitic steels can be useful to determine influence of microstructure on mechanical properties obtained in static and dynamic tensile test. Originality/value: Microstructure evolution in various conditions of hot-rolling for advanced high-manganese austenitic steels were investigated.

Słowa kluczowe

EN

high-manganese austenitic steel hot-rolling; grain refinement; dynamic recrystallization; static recrystallization

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 46, nr 1
• Strony: 71--78
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Dobrzyński L A

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Borek W.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

Bibliografia

• [1] G. Frommeyer, U. Brüx, K. Brokmeier, R. Rablbauer, Development, microstructure and properties of advanced high-strength and supraductile light-weight steels based on Fe-Mn-Al-Si-(C), Proceedings of the 6th International Conference on Processing and Manufacturing of Advanced Materials, Thermec’2009, Berlin, 2009, 162.
• [2] G. Frommeyer, O. Grässel, High strength TRIP/TWIP and superplastic steels: development, properties, application, La Revue de Metallurgie-CIT 10 (1998) 1299-1310.
• [3] G. Frommeyer, U. Brüx, P. Neumann, Supra-ductile and high-strength manganese-TRIP/TWIP steels for high energy absorption purposes, ISIJ International 43 (2003) 438-446.
• [4] O. Grässel, L. Krüger, G. Frommeyer, L.W. Meyer, High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development -properties - application, International Journal of Plasticity 16 (2000) 1391-1409.
• [5] R. Kuziak, R. Kawalla, S. Waengler, Advanced high strength steels for automotive industry, Archives of Civil and Mechanical Engineering 8/2 (2008) 103-117.
• [6] A. Saeed-Akbari, W. Bleck, U. Prahl, The study of grain size effect on the microstructure development and mechanical properties of a high-Mn austenitic steel, Proceedings of the 6th International Conference on Processing and Manufacturing of Advanced Materials, Thermec’2009, Berlin, 2009, 194.
• [7] S. Allain, J.P. Chateau, O. Bouaziz, S. Migot, N. Guelton, Correlations between the calculated stacking fault energy and the plasticity mechanisms in Fe-Mn-C alloys, Materials Science and Engineering A 387-389 (2004) 158-162.
• [8] T. Bator, Z. Muskalski, S. Wiewiórkowska, J.W. Pilarczyk, Influence of the heat treatment on the mechanical properties and structure of TWIP steel in wires, Archives of Materials Science and Engineering 28/6 (2007) 337-340.
• [9] E. Mazancova, I. Schindler, K. Mazanec, Stacking fault energy analysis of the high manganese TWIP and TRIPLEX alloys, Metallurgical Letters 3 (2009) 55-58.
• [10] J. Kliber, T. Kursa, I. Schindler, The influence of hot rolling on mechanical properties of high-Mn TWIP steels, Proceedings of the 3rd International Conference on Thermomechanical Processing of Steels, TMP‘2008, Padua, 2008, 1-12 (CD-ROM).
• [11] J. Kliber, T. Kursa, I. Schindler, Hot rolling of steel with TWIP effect, Metallurgist - Metallurgical News 8 (2008) 481-483.
• [12] S. Vercammen, B. Blanpain, B.C. De Cooman, P. Wollants, Mechanical behaviour of an austenitic Fe-30Mn-3Al-3Si and the importance of deformation twinning, Acta Materialia 52 (2004) 2005-2012.
• [13] A. Grajcar, W. Borek, The thermo-mechanical processing of high-manganese austenitic TWIP-type steels, Archives of Civil and Mechanical Engineering 8/4 (2008) 29-38.
• [14] L.A. Dobrzański, A. Grajcar, W. Borek, Influence of hot-working conditions on a structure of high-manganese austenitic steels, Journal of Achievements in Materials and Manufacturing Engineering 29/2 (2008) 139-142.
• [15] L.A. Dobrzański, A. Grajcar, W. Borek, Microstructure evolution and phase composition of high-manganese austenitic steels, Journal of Achievements in Materials and Manufacturing Engineering 31/2 (2008) 218-225.
• [16] L.A. Dobrzański, A. Grajcar, W. Borek, Hot-working behaviour of high-manganese austenitic steels, Journal of Achievements in Materials and Manufacturing Engineering 31/1 (2008) 7-14.
• [17] L.A. Dobrzański, A. Grajcar, W. Borek, Microstructure evolution of high-manganese steel during the thermo-mechanical processing, Archives of Materials Science and Engineering 37/2 (2009) 69-76.
• [18] L.A. Dobrzański, W. Borek, Hot-working of advanced high-manganese austenitic steels, Journal of Achievements in Materials and Manufacturing Engineering 43/2 (2010) 507-526.
• [19] G. Niewielski, Changes of structure and properties of austenitic steel caused by hot deformation, Scientific Books of the Silesian University of Technology 58, The Silesian University of Technology Publishers, Gliwice, 2000 (in Polish).
• [20] G. Niewielski, M. Hetmańczyk, D. Kuc, Influence of the initial grain size and deformation parameters on the mechanical properties during hot plastic deformation of austenitic steels, Materials Engineering 24/6 (2003) 795-798 (in Polish).
• [21] N. Cabanas, N. Akdut, J. Penning, B.C. De Cooman, High-temperature deformation properties of austenitic Fe-Mn alloys, Metallurgical and Materials Transactions A 37 (2006) 3305-3315.
• [22] A.S. Hamada, L.P. Karjalainen, M.C. Somani, The influence of aluminium on hot deformation behaviour and tensile properties of high-Mn TWIP steels, Materials Science and Engineering A 467 (2007) 114-124.
• [23] A.S. Hamada, L.P. Karjalainen, M.C. Somani, R.M. Ramadan, Deformation mechanisms in high-Al bearing high-Mn TWIP steels in hot compression and in tension at low temperatures, Materials Science Forum 550 (2007) 217-222.
• [24] A. Grajcar, M. Opiela, G. Fojt-Dymara, The influence of hot-working conditions on a structure of high-manganese steel, Archives of Civil and Mechanical Engineering 9/3 (2009) 49-58
• [25] A. Grajcar, Hot-working in the y+a region of TRIP-aided microalloyed steel, Archives of Materials Science and Engineering 28/12 (2007) 743-750.
• [26] J. Adamczyk, A. Grajcar, Heat treatment and mechanical properties of low-carbon steel with dual-phase microstructure, Journal of Achievements in Materials and Manufacturing Engineering 22/1 (2007) 13-20.
• [27] J. Adamczyk, A. Grajcar, Structure and mechanical properties of DP-type and TRIP-type sheets, Journal of Materials Processing Technology 162-163 (2005) 267-274.
• [28] A. Grajcar, Effect of hot-working in the y+a range on a retained austenite fraction in TRIP-aided steel, Journal of Achievements in Materials and Manufacturing Engineering 22/2 (2007) 79-82.
• [29] K. Renard, H. Idrissi, S. Ryelandt, F. Delannay, D. Schryvers, P.J. Jacques, Strain-hardening mechanisms in Fe-Mn-C austenitic TWIP steels: Mechanical and micromechanical characterisation, Proceedings of the 6th International Conference on Processing and Manufacturing of Advanced Materials, Thermec’2009, Berlin, 2009, 72.
• [30] Y.G. Kim, J.M. Han, J.S. Lee, Composition and temperature dependence of tensile properties of austenitic Fe-Mn-Al-C alloys, Materials Science and Engineering A 114 (1989) 51-59.