Abstract
A Mn18Cr2 steel containing TiN precipitates was fabricated by vacuum induction melting. The morphology of TiN precipitates and the interface orientation relationship between TiN and γ-Fe were characterized by means of SEM, TEM and SAED, and the formation mechanism of TiN precipitates in Mn18Cr2 steel was clarified. Results show that the TiN precipitates are more likely to exhibit a cubic-shaped morphology and form both within the grain and at the grain boundary of γ-Fe. The interface orientation relationship between TiN and γ-Fe is determined as follows: \({(100)_{{\rm{TiN}}}}//{(1\bar 11)_{{\rm{\gamma}} - {\rm{Fe}}}},\,\,{[0\bar 11]_{{\rm{TiN}}}}//{[\bar 112]_{{\rm{\gamma}} - {\rm{Fe}}}}\). Because of the smallest interfacial misfit, the secondary close-packed lane {100} of TiN preferentially combines with the close-packed plane {111} of γ-Fe during the precipitation in order to minimize the interface energy. After nucleation, the TiN precipitates exhibit cubic appearance due to the fact that the TiN has a FCC structure with rock salt type structure. This study provides reference for the material design of the austenitic high-manganese steels with excellent yield strength.
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References
Sohn S S, Hong S, Lee J, et al. Effects of Mn and Al contents on cryogenic-temperature tensile and Charpy impact properties in four austenitic high-Mn steels. Acta Mater., 2015, 100: 39–52.
Wang Z, Lin T, He X B, et al. Microstructure and properties of TiC-high manganese steel cermet prepared by different sintering processes. J. Alloys Compd., 2015, 650: 918–924.
Lee S I, Lee S Y, Han J, et al. Deformation behavior and tensile properties of an austenitic Fe-24Mn-4Cr-0.5C high-manganese steel: Effect of grain size. Mater. Sci. Eng. A, 2019, 742: 334–343.
Bambach M, Conrads L, Daamen M, et al. Enhancing the crashworthiness of high-manganese steel by strain-hardening engineering, and tailored folding by local heat-treatment. Mater. Des., 2016, 110: 157–168.
Yuan X Y, Chen L Q, Zhao Y, et al. Influence of annealing temperature on mechanical properties and microstructures of a high manganese austenitic steel. J. Mater. Process. Technol., 2015, 217: 278–285.
Wen Y H, Peng H B, Si H T, et al. A novel high manganese austenitic steel with higher work hardening capacity and much lower impact deformation than Hadfield manganese steel. Mater. Des., 2014, 55: 798–804.
Jeong K, Jin J E, Jung Y S, et al. The effects of Si on the mechanical twinning and strain hardening of Fe-18Mn-0.6C twinning-induced plasticity steel. Acta Mater., 2013, 61: 3399–3410.
Gwon H, Kim J K, Jian B, et al. Partially-recrystallized, Nb-alloyed TWIP steels with a superior strength-ductility balance. Mater. Sci. Eng. A, 2018, 711: 130–139.
Mejía I, Salas-Reyes A E, Bedolla-Jacuinde A, et al. Effect of Nb and Mo on the hot ductility behavior of a high-manganese austenitic Fe-21Mn-1.3Al-1.5Si-0.5C TWIP steel. Mater. Sci. Eng. A, 2014, 616: 229–239.
Scott C P, Remy B, Collet J L, et al. Precipitation strengthening in high manganese austenitic TWIP steels. Int. J. Mater. Res., 2011, 102(5): 538–549.
Gutierrez-Urrutia I, Raabe D. Grain size effect on strain hardening in twinning-induced plasticity steels. Scripta Mater., 2012, 66(12): 992–996.
Kang S, Jung J G, Kang M, et al. The effects of grain size on yielding, strain hardening, and mechanical twinning in Fe-18Mn-0.6C-1.5Al twinning-induced plasticity steel. Mater. Sci. Eng. A, 2016, 652: 212–220.
Ma Y P, Li X L, Wang C H, et al. Microstructure and impact wear resistance of TiN reinforced high manganese steel matrix. J. Iron Steel Res. Int., 2012, 19: 60–65.
Penna R V, Bartlett L N, O’Malley R. Influence of TiN additions on the microstructure of a lightweight Fe-Mn-Al steel. Inter. J. Metalcast., 2019, 14: 342–355.
Fu J W, Nie Q Q, Qiu W X, et al. Crystallography and growth mechanism of TiN in Fe-17Cr stainless steel during solidification. J. Mater. Process. Tech., 2018, 253: 43–50.
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The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant No. U1604251) and the Major Scientific and Technological Project of Luoyang, China (Grant No. 2001017A).
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Jing-pei Xie Ph. D., Professor. His main research interest is mainly focused on metal matrix composites. He has completed 45 national and provincial scientific research projects, which were financially supported by the National Natural Science Foundation of China, and the National Science and Technology Support Program. He has received one Second Prize and one Third Prize for Progress in Science and Technology of China. To date, he has published 8 books and more than 400 academic papers, and holds 48 invention patents of China.
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Wang, Zh., Xie, Jp., Li, Q. et al. TiN/γ-Fe interface orientation relationship and formation mechanism of TiN precipitates in Mn18Cr2 steel. China Foundry 18, 180–184 (2021). https://doi.org/10.1007/s41230-021-9020-6
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DOI: https://doi.org/10.1007/s41230-021-9020-6