The influence of nanomodification on the formation of microstructure of the welded joints metal of low-alloy steel

Keywords

low-alloy steel, welding, microstructure, modification, inoculation, nanosized oxides.

Cite as

Golovko V. V., Kostin V. A., and Zhukov V. V. The influence of nanomodification on the formation of microstructure of the welded joints metal of low-alloy steel. Physicochemical Mechanics of Materials. 2023. 59(6), 111-117.

https://doi.org/10.15407/pcmm2023.06.111

Abstract

The inoculation of nano-sized particles of refractory Al₂O₃, TiO₂, MgO, ZrO₂ oxides into the welding bath was studied. The inoculation of oxides with a low-level mismatch to the δ-Fe lattice and increased wetting with liquid iron (MgO, ZrO₂) contributes to the growth of dendrites, which are formed during melt crystallization. Metal modification with MgO, ZrO₂ oxides decreases the hardness of polygonal ferrite and increases the content of lower bainite in the microstructure of joints, brittle fracture resistance of the joint metal. Metal modification with Al₂O₃, TiO₂ oxides contributes to an increase in the hardness of polygonal ferrite, the content of upper bainite in the joints microstructure and strength of welded joints of low-alloy steels.

References

1. A. Varshney, S. Sangal, S. Kundu, and K. Mondal, “Super strong and highly ductile low alloy multiphase steels consisting of bainite, ferrite and retained austenite,” Mater. and Design., 95, 75-88 (2016). https://doi.org/10.1016/j.matdes.2016.01.078
2. V. Lang, J. Puerta, K. Eriksson, M. Crouvizier, F. G. Caballero, A. J. Ristola, J. Cornide, T. T. Nyo, C. Garcia-Mateo, L. E. Lindgren, A. Hirvi, P. Suikkanen, E. Vuorinen, G. Berglund, S. Allain, T. Mastrorillo, and L. Jantzen, New Advanced Ultra High Strength Bainitic Steels: Ductility and Formability (DUCTAFORM), Publications Office, European Commission, Directorate-General for Research and Innovation, Luxembourg (2013).
3. H. Halfa, “Recent trends in producing ultrafine grained steels,” J. of Minerals and Materials. Characterization and Eng., Is. 2, 428-469 (2014). https://doi.org/10.4236/jmmce.2014.25047
4. L. L. Hsiung, M. J. Fluss, S. J. Tumey, B. W. Choi, Y. Serruys, F. Willaime, and A. Kimura, “Formation mechanism and the role of nanoparticles in Fe-Cr ODS steels developed for radiation tolerance,” Physical Review B – Condensed Matter and Materials Physics, 82, Is. 18, art. no. 184103 (2010). https://doi.org/10.1103/PhysRevB.82.184103
5. J. H. Schneibel, and B. K. Kad, “Nanoprecipitates in steels,” In Proc. of the Twenty First Annual Conf. on Fossil Energy Materials (2007).
6. V. Y. Stetsenko, “Nanostructure processes of melting, crystallization and modification of metals,” Litiyo i Metallurgiya (Foundry Production and Metallurgy) [in Russian], 3, Is. 80, 51-53 (2015).
7. V. V. Golovko, S. N. Stepaniuk, and D. Yu. Yermolenko, “Study of the influence of nanosized titanium carbides on the formation of the microstructure and properties of welds,” Fuzychna Khimiya ta Metalloznavstvo, Is. 6, 68-75 (2012).
8. V. V. Golovko, O. O. Shtofel, and D. Yu. Korolenko, “The influence of the character of the distribution of non-metallic inclusions on the mechanical properties of weld metal of low-alloy steels,” Avtomatychne Zvariuvannia, Is. 3, 5-9 (2003).
9. V. T. Cherepyn, Experimental Technique in Physical Metallurgy [in Ukrainian], Tekhnika, Kyiv (1968).
10. A. D. Panasyuk, V. S. Fomenko, and G. G. Glebova, Stability of Non-Metallic Materials in Melts [in Russian], Naukova Dumka, Kyiv (1986).
11. B. A. Movchan, and Sh. A. Abitdinov, “The movement of the interphase boundary during the crystallization of the weld point,” Avtomaticheskaya Svarka [in Russian], Is. 12, 4-8 (1968).