PSI - Issue 14

P Ponguru Senthil et al. / Procedia Structural Integrity 14 (2019) 729–737 Author name / Structural Integrity Procedia 00 (2018) 000 – 000

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also increased the fraction of bainite from 75% to 85%. There is no significant increase in the strength whereas ductility increased significantly. Presence of primary niobium carbo-nitride does not have any detrimental effect on impact toughness. The fractographs show increased ductile features. References Abbasi E., Rainforth W. M., 2016 Microstructural evolution during bainite transformation in a vanadium microalloyed TRIP-assisted steel, Materials Science and Engineering A, 651 822-830. Avanish Kumar, Aparna Singh, 2018, Toughness dependence of nano-bainite on phase fraction and morphology, Materials Science and Engineering A, 729 439-443. Avishan B., Yazdani S., Nedjad S. H., 2012, Toughness variations in nanostructured bainitic steels, Materials Science and Engineering A, 548 106-111. Avishan B., Yazdani S., Caballero F., Wang T., Garcia Mateo C., 2015, Characterization of microstructure and mechanical properties in two different nano structured bainitic steels, Materials Science and Technology, 31 1508-1520. Avishan B., 2018, Transformation induced plasticity effect under tensile and compression stresses in nanostructured bainite, Materials Science and Engineering A, 729 362-369. Arunim Ray, 2017, Niobium microalloying in rail steels, Materials Science and Technology, 33 1584-1600. Bhadeshia H.K.D.H., 2008, Properties of fine-grained steels generated by displacive transformation, Materials Science and Engineering A 481 – 482 36 – 39 Caballero F. G., Bhadeshia H. K. D. H., Mawella K. J. A., Jones D. G., Brown P., 2002, Very strong low temperature bainite, Material Science and Technology, 18 279 – 284, Caballero F. G., Garcia Mateo C., Santofimia M. J., Miller M. K., Garcila de Andres C., 2009, New experimental evidence on the incomplete transformation phenomenon in steel, Acta Materialia, 57 8-17. Garcia Mateo C., Caballero F. G., 2005, The role of retained austenite on tensile properties of steels with bainitic microstructures, Materials Transactions, 46 1839-1846. Kritika Singh, Avanish Kumar, Aparna Singh,2018, Effect of Prior Austenite Grain Size on the Morphology of Nano-Bainitic Steels, Metallurgical And Materials Transactions A, 4/2018 Medin S. F., Quispe A., Valles P., Banos J. L., 1999, Recrystallization-Precipitation interaction study of two medium Carbon niobium microalloyed steels, ISIJ International, 39 913-922 Peet M. J., Fielding L. C. D., Hamedany A. A., Rawson M., Hill P., Bhadeshia H. K. D. H., 2017, Strength and toughness of clean nanostructured bainite, Materials Science and Technology, 836 1171-1179. Speer J. G., Michael J. R., Hansen S. S., 1987, Carbonitride Precipitation in Niobium/Vanadium Microalloyed Steels, Metallurgical Transactions A, 18A 211-222. Speer J. G., Hansen S. S., 1989, Austenite recrystallization and carbonitride precipitation in Niobium microalloyed Steels, Metallurgical Transactions A, 20A 25-38.