Abstract
Studies on phase transformations in Fe-11Al-5Mn-1C (Alloy 1) and Fe-11Al-10Mn-1C (Alloy 2) ferritic low-density steels were carried out using differential thermal analysis (DTA) and dilatometry (all compositions in wt.%). An appreciable difference was observed between the phase transformation temperatures predicted by the ThermoCalc software and the experimental values. The ferrite + kappa carbide → austenite phase transformation started around 1017 °C for Alloy 1 and 960 °C for Alloy 2. The dissolution of carbides was completed around 1115 °C and 1050 °C for Alloy 1 and Alloy 2, respectively. Studies on water quenched alloys were carried out to confirm the phase transformation temperatures. Both the alloys were hot rolled at 1000 °C. The rolled alloys exhibited high yield and tensile strength due to the presence of a large volume fraction of kappa carbides. After hot rolling, Alloy 2 exhibited higher ductility than Alloy 1. This is attributed to the presence of a higher volume fraction of metastable austenite in Alloy 2. Reasons for the presence of metastable austenite are discussed. Fracture surfaces of the tensile samples revealed crack initiation and propagation along ferrite-kappa carbide interfaces.
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5. References
G. Frommeyer and U. Brox, Microstructures and Mechanical Properties of High-Strength Fe-Mn-AI-C Light-Weight TRIPLEX Steels, Steel Res. Int., 2006, 77, p 627–633.
M. Palm and G. Inden, Experimental Determination of Phase Equilibria in the Fe-Al-C System, Intermetallics, 1995, 3, p 443–454.
X. Li, A. Scherf, M. Heilmaier and F. Stein, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilibria Diffus., 2016, 37(2), p 162–173.
A. Schneider, L. Falat, G. Sauthoff and G. Frommeyer, Microstructures and Mechanical Properties of Fe3Al-Based Fe–Al–C Alloys, Intermetallics, 2005, 13, p 1322–1331.
Y. Feng, R. Song, S. Peng, Z. Pei and R. Song, Microstructures and Impact Wear Behavior of Al-Alloyed High-Mn Austenitic Cast Steel After Aging Treatment, J. Mater. Eng. Perform., 2019, 28(8), p 4845–4855.
K. Chin, H. Lee, J. Kwak, J. Kang and B. Lee, Thermodynamic Calculation on the Stability of (Fe, Mn) 3 AlC Carbide in High Aluminum Steels, J. Alloys Compd., 2010, 505(1), p 217–223.
W. Cheng, Y. Song, Y. Lin, K. Chen and P.C. Pistorius, On the Eutectoid Reaction in a Quaternary Fe-C-Mn-Al Alloy: Austenite Fi Ferrite + Kappa-Carbide + M 23 C 6 Carbide, Metall. Mater. Trans. A, 2014, 45(March), p 1199–1216.
W. Cheng, Phase Transformations of an Fe-0.85C-17.9 Mn-7.1Al Austenitic Steel After Quenching and Annealing, JOM, 2014, 66(9), p 1809–1820.
Y. Kimura, K. Handa, K. Hayashi and Y. Mishima, Microstructure Control and Ductility Improvement of the Two-Phase γ-Fe/κ-(Fe, Mn)3AlC Alloys in the Fe–Mn–Al–C Quaternary System, Intermetallics, 2004, 12, p 607–617.
K. Sato, K. Tagawa and Y. Inoue, Age Hardening of an Fe-30Mn-9Al-0.9C Alloy, Scr. Mater., 1988, 22, p 899–902.
S. Khaple, R.G. Baligidad, V.V. Satya Prasad and D.V.V. Satyanarayana, Microstructure and Mechanical Properties of Fe–7Al Based Lightweight Steel Containing Carbon, Mater. Sci. Technol., 2015, 31(12), p 1408–1416.
Z. Cai, H. Ding, Z. Ying and R.D.K. Misra, Microstructural Evolution and Deformation Behavior of a Hot-Rolled and Heat Treated Fe-8Mn-4Al-0.2C Steel, J. Mater. Eng. Perform., 2014, 23, p 1131–1137.
M. Eskandari, A. Zarei-Hanzaki, A.R. Kamali, M.A. Mohtadi-Bonab and J.A. Szpunar, Strain Hardening During Hot Compression Through Planar Dislocation and Twin-Like Structure in a Low-Density High-Mn Steel, J. Mater. Eng. Perform., 2014, 23(10), p 3567–3576.
J.D. Yoo and K. Park, Microband-Induced Plasticity in a High Mn–Al–C Light Steel, Mater. Sci. Eng. A, 2008, 496, p 417–424.
J.D. Yoo, S.W. Hwang and K. Park, Communication Origin of Extended Tensile Ductility of a Fe-28Mn-10Al-1C Steel, Metall. Mater. Trans. A, 2009, 40A, p 1520–1523.
R.A. Howell and D.C. Van Aken, A Literature Review of Age Hardening Fe-Mn-Al-C Alloys, Iron Steel Technol., 2009, 6(4), p 193–212.
C. Castan, F. Montheillet and A. Perlade, Dynamic Recrystallization Mechanisms of an Fe–8 % Al Low Density Steel under Hot Rolling Conditions, Scr. Mater., 2013, 68(6), p 360–364.
R. Rana, C. Liu and R.K. Ray, Low-Density Low-Carbon Fe–Al Ferritic Steels, Scr. Mater., 2013, 68(6), p 354–359.
R.G. Baligidad and A. Radhakrishna, Effect of B, Zr, Ce and Nb Addition on Structure and Mechanical Properties of High Carbon Fe-10.5 wt% Al Alloy, J. Mater. Sci. Lett., 2002, 21(16), p 1231–1235.
R.G. Baligidad and K.S. Prasad, Effect of Al and C on Structure and Mechanical Properties of Fe–Al–C Alloys, Mater. Sci. Technol., 2007, 23(1), p 38–44.
R.G. Baligidad, U. Prakash and A.R. Krishna, On Elevated Temperature Stability of High Carbon Fe-Al Alloys, Mater. Sci. Eng. A, 1999, 265, p 301–305.
S.Y. Han, S.Y. Shin, S. Lee, N.J. Kim, J.H. Kwak and K.G. Chin, Effect of Carbon Content on Cracking Phenomenon Occurring during Cold Rolling of Three Light-Weight Steel Plates, Metall. Mater. Trans. A Phys. Metall. Mater. Sci., 2011, 42(1), p 138–146.
S.S. Sohn, B. Lee, S. Lee and J. Kwak, Effects of Aluminum Content on Cracking Phenomenon Occurring during Cold Rolling of Three Ferrite-Based Lightweight Steel, Acta Mater., 2013, 61(15), p 5626–5635.
S.S.U. Sohn, B. Lee, S. Lee and J. Kwak, Effect of Mn Addition on Microstructural Modification and Cracking Behavior of Ferritic Light-Weight Steels, Metall. Mater. Trans. A, 2014, 45, p 5469–5485.
J. Seol, D. Raabe, P. Choi, H. Park, J. Kwak and C. Park, Direct Evidence for the Formation of Ordered Carbides in a Ferrite-Based Low-Density Fe–Mn–Al–C Alloy Studied by Transmission Electron Microscopy and Atom Probe Tomography, Scr. Mater., 2013, 68(6), p 348–353.
D. Liu, H. Ding, M. Cai and D. Han, Hot Deformation Behavior and Processing Map of a Fe-11Mn-10Al-0.9C Duplex Low-Density Steel Susceptible to κ-Carbides, J. Mater. Eng. Perform., 2019, 28(8), p 5116–5126.
M.S. Kim and Y.B. Kang, Development of Thermodynamic Database for High Mn-High Al Steels: Phase Equilibria in the Fe-Mn-Al-C System by Experiment and Thermodynamic Modeling, Calphad Comput. Coupling Phase Diagrams Thermochem., 2015, 51, p 89–103.
K.W. Andrews, Empirical Formulae for the Calculation of Some Transformation Temperatures, J. Iron Steel Inst., 1965, 203, p 721–727.
R. Zhang, W. Zheng, X. Veys, G. Huyberechts, H. Springer and M. Selleby, Prediction of Martensite Start Temperature for Lightweight Fe-Mn-Al-C Steels, J. Phase Equilibria Diffus., 2018, 39(5), p 476–489.
R.G. Baligidad and A. Radhakrishna, Processing of Fe-Al-C-Ce Alloys through Air Induction Melting with Flux Cover (AIMFC) and Electroslag Remelting (ESR), J. Mater. Sci., 2002, 7, p 5021–5028.
J. Jeong, C. Lee, I. Park and Y. Lee, Isothermal Precipitation Behavior of κ-carbide in the Fe–9Mn–6Al–015C Lightweight Steel with a Multiphase Microstructure, J. Alloys Compd., 2013, 574, p 299–304.
S.Y. Shin, H. Lee, S.Y. Han, C. Seo, K. Choi, S. Lee, N.J. Kim and J. Kwak, Correlation of Microstructure and Cracking Phenomenon Occurring during Hot Rolling of Lightweight Steel Plates, Metall. Mater. Trans. A, 2010, 41A, p 138–148.
W.J. Lu and R.S. Qin, Influence of κ -Carbide Interface Structure on the Formability of Lightweight Steels, Mater. Des., 2016, 104, p 211–216.
C. Zhao, R. Song, L. Zhang, F. Yang and T. Kang, Effect of Annealing Temperature on the Microstructure and Tensile Properties of Fe–10Mn–10Al–07C Low-Density Steel, JMADE, 2016, 91, p 348–360.
Acknowledgments
The work was supported by ER&IPR, DRDO, New Delhi. Dilatometry studies were carried out at IEHK, RWTH Aachen University, Germany when one of the authors (UP) was a guest of Prof. W. Bleck. The visit was supported by Alexander von Humboldt Foundation, Germany. Help of Dr. S. R. Meka in analyzing phase transformations is also appreciated.
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Rawat, P., Prakash, U. & Prasad, V.V.S. Phase Transformation and Hot Working Studies on High-Al Fe-Al-Mn-C Ferritic Low-Density Steels. J. of Materi Eng and Perform 30, 6297–6308 (2021). https://doi.org/10.1007/s11665-021-05857-3
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DOI: https://doi.org/10.1007/s11665-021-05857-3