Mechanical properties and microstructure of high-manganese TWIP, TRIP and TRIPLEX type steels

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

Abstrakty

EN

Purpose: The aim of this paper is to determine the high-manganese austenite propensity to twinning induced by the cold working and its effect on structure and mechanical properties, and especially the strain energy per unit volume of new-developed high-manganese Fe-Mn-(Al, Si) investigated steels, including selected high-manganese austenitic TWIP steels containing 25-27.5% Mn, 1-4% Si, 2-3% Al, high-manganese TRIP steels containing 17-18% Mn, about 1% Si, about 3% Al and selected high-manganese TRIPLEX steels containing 24% Mn and about 11% Al and some of that steels with Nb and Ti microadditions, with various structures after their heat- and thermo-mechanical treatments. Design/methodology/approach: The microstructure evolution in successive stages of deformation was determined in metallographic investigations using light, scanning and electron microscopies as well as X-ray diffractomiter. Findings: New-developed steels achieve profitable connection of mechanical properties, i.e. (ultimate tensile strength) UTS~800-1000 MPa, (yield strength) YS0.2 = 250-450 MPa, and plastic (uniform elongation) UEl = 35-90%, and moreover, particularly strong formability and strain hardening occurring during forming. The new-developed high-manganese Fe-Mn-(Al, Si) steels provide an extensive potential for automotive industries through exhibiting the twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) mechanisms. Practical implications: The obtained microstructure - hot-working conditions relationships and stress-strain curves can be useful in determination of power-force parameters of hot-rolling for sheets with fine-grained austenitic structures. Originality/value: Results obtained for new-developed high-manganese austenitic steels with the properly formed structure and properties in the heat treatment- or thermo-mechanical processes indicate the possibility and purposefulness of their employment for constructional elements of vehicles, especially of the passenger cars to take advantage of the significant growth of their strain energy per unit volume which guarantee reserve of plasticity in the zones of controlled energy absorption during possible collision resulting from activation of twinning for TWIP steels, supported with martensitic transformation for TRIP steels, induced cold working, which may result in significant growth of the passive safety of these vehicles’ passengers.

Słowa kluczowe

EN

high manganese TWIP, TRIP & TRIPLEX steels; TWIP & TRIP mechanisms; fracture counteraction; strengthening mechanisms; mechanical properties

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 230--238
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Dobrzański 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, 2009, Berlin, 162.
• [2] G. Frommeyer, U. Brüx, P. Neumann, Supra-ductile and high-strength manganese-TRIP/TWIP steels for high energy absorption purposes, The Iron and Steel Institute of Japan International 43 (2003) 438-446.
• [3] 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.
• [4] J.A. Jiménez, G. Frommeyer, Analysis of the microstructure evolution during tensile testing at room temperature of high-manganese austenitic steel, Materials Characterization 6 (2010) 221-226.
• [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] O. Bouaziz, S. Allain, C.P. Scott, P. Cugy, D. Barbier, High manganese austenitic twinning induced plasticity steels: A review of the microstructure properties relationships, Current Opinion in Solid State and Materials Science 15 (2011) 141-168.
• [7] Z. Gronostajski, A. Niechajowicz, S. Polak, Prospects for the use of new-generation steels of the AHSS type for collision energy absorbing components, current Opinion in solid State and Materials Science 15 (2011) 141-168.
• [8] 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.
• [9] 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.
• [10] 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.
• [11] 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.
• [12] L.A. Dobrzański, W. Borek, Hot-Working Behaviour of Advanced High-Manganese C-Mn-Si-Al Steels, Materials Science Forum 654-656 (2010) 266-269.
• [13] L.A. Dobrzański, W. Borek, Microstructure forming processes of the 26Mn-3Si-3Al-Nb-Ti steel during hot-working conditions, Journal of Achievements in Materials and Manufacturing Engineering 40/1(2010) 25-32.
• [14] L.A. Dobrzański, W. Borek, Processes forming the microstructure evolution of highmanganese austenitic steel in hotworking conditions, Journal of Achievements in Materials and Manufacturing Engineering 37/2 (2009) 397-407.
• [15] L.A. Dobrzański, W. Borek, Hot deformation and recrystallization of advanced high-manganese austenitic TWIP steels, Journal of Achievements in Materials and Manufacturing Engineering 46/1 (2011) 71-78.
• [16] L.A. Dobrzański, W. Borek, Thermo-mechanical treatment of Fe-Mn-(Al, Si) TRIP/TWIP steels, Archives of Civil and Mechanical Engineering 12/3 (2012) 299-304.
• [17] L.A. Dobrzański, W. Borek, Hot-rolling of advanced high-manganese C-Mn-Si-Al steels, Materials Science Forum 706-709 (2012) 2053-2058.
• [18] 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.
• [19] A. Grajcar, Hot-working in the y+a region of TRIP-aided microalloyed steel, Archives of Materials Science and Engineering 28 (2007) 743-750.
• [20] 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 (2007) 79-82.
• [21] K.T. Park, K.G. Jin, S.Ho Han, S. Woo Hwang, K. Choi,C. Soo Lee, Stacking fault energy and plastic deformation of fully austenitic high manganese steels: Effect of Al addition, Materials Science and Engineering A 527 (2010) 3651-3661.
• [22] G. Dini, A. Najafizadeh, R. Ueji, S.M. Monir-Vaghefi, Tensile deformation behavior of high manganese austenitic steel: The role of grain size, Materials and Design 31 (2010) 3395-3402.
• [23] R.F. Kuble, M. Berveiller, P. Buessler, Semi phenomenological modelling of the behavior of TRIP steels, International Journal of Plasticity 27 (2011) 299-327.
• [24] A. Weidner, S. Martin, V. Klemm, U. Martin, H. Biermann, Stacking faults in high-alloyed metastable austenitic cast steel observed by electron channelling contrast imaging, Scripta Materialia 64 (2011) 513-516.
• [25] F. Lu, P. Yang, L. Meng, F. Cui. H. Ding, Influences of Thermal Martensites and Grain Orientations on Strain-induced Martensites in High Manganese TRIP/TWIP Steels, Journal of Materials Science and Technology 27/3 (2011) 257-265.
• [26] L.A. Dobrzański, W. Borek, M. Ondrula, Thermomechanical processing and microstructure evolution of high-manganese austenitic TRIP-type steels, Journal of Achievements in Materials and Manufacturing Engineering 53/2 (2012) 59-66.
• [27] L.A. Dobrzański, W. Borek, Hot-rolling of high-manganese Fe - Mn - (Al, Si) TWIP steels, Proceedings of 8th International Conference on Industrial Tools and Material Processing Technologies ICIT&MPT’2011, Slovenia, 2011, 117-120.
• [28] A. Grajcar, R. Kuziak, W. Zalecki, Designing of cooling conditions for Si-Al microalloyed TRIP steel on the basis of DCCT diagrams, Journal of Achievements in Materials and Manufacturing Engineering 45/2 (2011) 115-124.
• [29] A. Grajcar, H. Krztoń, Effect of isothermal bainitic transformation temperature on retained austenite fraction in C-Mn-Si-Al-Nb-Ti TRIP-type steel, Journal of Achievements in Materials and Manufacturing Engineering 35/2 (2009) 169-176.
• [30] A. Grajcar, M. Opiela, Influence of plastic deformation on CCT-diagrams of low-carbon and medium-carbon TRIP steels, Journal of Achievements in Materials and Manufacturing Engineering 29/1 (2008) 71-78.