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 MSA  Vol.7 No.3 , March 2016
Influence of Oxygen Addition on Structure and Properties of Titanium Produced by Electroslag Remelting
Abstract: The current work is devoted to the investigation of oxygen impact on the structure and properties of titanium. For this purpose, oxygen was introduced into titanium during chamber electro-slag remelting by three different methods: alloying by oxygen-rich residues from the Kroll process to final values between 0.053 wt.-% and 0.40 wt.-%, by reaction with the gas phase to 0.27 wt.-% and by introduction of TiO2 nanoparticles to 0.73 wt.-%. The influence of oxygen on microstructure of titanium during crystallization, heat treatment and deformation is determined as well as the effect of oxygen on the hardness and the mechanical properties of the material in different structural states. Furthermore, control methods of the structure formation process by thermal effects are proposed. Results show that the chamber electroslag remelting allows obtaining a homogeneous structure of the ingot in the investigated range of oxygen content in titanium. The hardness does not vary by more than 10 percent in longitudinal or radial direction in any of the remelted ingots.
Cite this paper: Snizhko, O. , Ryabtsev, A. , Troyanskyy, A. , Pashinskii, V. , Friedrich, B. , Morscheiser, J. and Bartosinski, M. (2016) Influence of Oxygen Addition on Structure and Properties of Titanium Produced by Electroslag Remelting. Materials Sciences and Applications, 7, 139-149. doi: 10.4236/msa.2016.73014.
References

[1]   Elias, C.N., Lima, J.H.C., Valiev, R. and Meyers, M.A. (2008) Biomedical Applications of Titanium and Its Alloys. JOM, 60, 46-49.

[2]   Ryabtsev, A.D. and Troyanskyy, A.A. (2005) Electroslag Remelting of Metals and Alloys under Fluxes with Active Additions in Furnaces of Chamber Type (ChESR). Proceeding of the 2005 International Symposium on Liquid Metal Processing and Casting “LMPC 2005”, Santa Fe, USA, 18-21 September 2005, 227-232.

[3]   Ryabtsev, А.D. and Troyanskyy, А.А. (2005) The Electroslag Remelting of Metals and Alloys under Fluxes with Active Additive in the Furnaces of Chamber Type. Electrometallurgy, No. 4, 25-32.

[4]   Ryabtsev, А.D., Troyanskyy, А.А. and Davidov, S.I. (2009) The Refining of Titanium from Oxygen and Nitrogen during Electroslag Remelting. Modern Electrometallurgy, No. 4, 1-3.

[5]   Troyanskyy, А.А. and Ryabtsev, А.D. (2007) About Works of Donetsk National Technical University on Electroslag Melting and Refining of Titanium. Titanium, No. 1, 28-31.

[6]   Benz, M.G., Meschter, P.J., Nic, J.P., Perocchi, L.C., Gigliotti, M.F.X., Gilmore, R.S., Radchenko, V.N., Ryabtsev, A.D., Tarlov, O.V. and Pashinsky, V.V. (1999) ESR as a Fast Technique to Dissolve Nitrogen-Rich Inclusions in Titanium. Materials Research Innovations, No. 6, 364-368.

[7]   Ryabtsev, A.D. and Troyansky, A.A. (2008) Chamber Electroslag Remelting (ChESR)—A New Method for Enhanced Quality Ingot Production. Proceedings of the Third Biennial Academic Conference (Baosteel BAC 2008), Shanghai, 26-28 September 2008, 39-42.

[8]   Reitz, J., Friedrich, B. and Stoephasius, J.C. (2007) Fundamentals of Deoxidation Behaviour of Ti-Alloys by Chamber ESR with Ca-Reactive Slags. Proceedings of the European Metallurgical Conference (EMC 2007), 11-14 June 2007, Düsseldorf, 1377-1391.

[9]   Friedrich, B., Reitz, J. and Stoephasius, J.C. (2009) PESR Processing of TiAl-Electrodes Made by Aluminothermic Reduction. Proceeding of the 2009 International Symposium on Liquid Metal Processing and Casting “LMPC 2009”. Santa Fe, USA, 20-23 September 2009, 295-301.

[10]   Ryabtsev, А.D., Davidov, S.I., Troyanskyy, А.А., Shvarzman, L.Ya., Ryabtseva, О.А., Pashinsky, V.V. and Feofanov, K.L. (2007) The Obtaining of Titanium of Raised Toughness by the Way of Alloying by Oxygen during Chamber Electroslag Remelting. Modern Electrometallurgy, No. 3, 3-6.

[11]   Ratiev, S.N., Ryabtseva, О.А., Troyanskyy, А.А., Ryabtsev, А.D., Davidov, S.I. and Shvarzman, L.Ya. (2010) The Alloying of Titanium by Oxygen from the Gas Phase during Chamber Electroslag Remelting of Titanium Sponge. Modern Electrometallurgy, No. 2, 8-12.

[12]   Ryabtsev, A.D., Troyanskyy, A.A., Ratiev, S.M., Pashynskyy, V.V. and Snizhko, O.A. (2011) The Alloying of Titanium by Oxygen in the Process of Chamber Electro-Slag Remelting. Proceeding of the 2011 International Symposium on Liquid Metal Processing and Casting “LMPC 2011”, Nancy, 18-21 September 2011, 39-42.

[13]   Ryabtsev, A.D. (2011) The Refining and Alloying of Titanium in the Process of Chamber Electro-Slag Remelting. In: Friedrich, B. and Troyanskyy, A.A, Eds., Slags and Fluxes in Modern Metallurgy: Proceeding of the International Workshop on Metal-Slag Interactions, Shaker Verlag, Aachen, 175-188.

[14]   Ryabtsev, A.D., Troyanskyy, A.A., Davidov, S.I., Pashinsky, V.V., Snizhko, O.A., Ratiev, S.M. and Leoha, F.L. (2012) The Possibilities of Chamber Electroslag Remelting to Obtain a Commercial Purity Titanium. Modern Electrometallurgy, No. 1, 7-11.

[15]   Bumps, E.S., Kessler, H.D. and Hansen, M. (1953) The Titanium-Oxygen System. Transactions of the American Society for Metals, No. 45, 1008-1028.

[16]   Murray, J.L. and Wriedt, H.A. (1987) The O-Ti (Oxygen-Titanium) System. Bulletin of Alloy Phase Diagrams, No. 8, 148-165.

[17]   Chase Jr., M.W., Curnutt, J.L., Prophet, H., McDonald, R.A. and Syverud, A.N. (1975) JANAF Thermochemical Tables, 1975 Supplement. Journal of Physical and Chemical Reference Data, No. 4, 175.

[18]   Driz, M.E. (1997) The Properties of Elements. Metallurgiya, Moscow, 432 p.

[19]   Donachie Jr., M. (2000) Titanium: A Technical Guide. 2nd Edition, ASM International, Materials Park, 369 p.

[20]   Lutjering, G. and Williams, J.C. (2007) Titanium. 2nd Edition, Springer, Heidelberg, 431 p.

 
 
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