Aluminium Evaporation from Titanium Alloys in the VIM Process

Abstract:

In the paper, results of the study on aluminium evaporation from the Ti-Al alloy (6.5%mass) during smelting in a vacuum induction furnace (VIM) are presented as well as the kinetics of the process is discussed. The experiments were performed at 51000 Pa for 1972 K and 2023 K. Based on the determined values of aluminium overall mass transfer coefficient, the mass transfer coefficient in the liquid phase and the evaporation rate constant, the stages that determined the investigated process were defined. It was demonstrated that Al evaporation from the aluminium-titanium alloy is kinetically controlled.

• Periodical: Solid State Phenomena (Volume 211)
• Pages: 117-128
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.211.117
• Online since: November 2013
• Authors: Beata Oleksiak*, Leszek Blacha, Lubomir Pikna, Rafał Burdzik
• Keywords: Aluminum (Al), Evaporation, Titanium Alloy, VIM Process

References

[1] Y. Su, J. Guo, J. Jia, G. Liu, Y. Liu, Composition control of a TiAl melt during the induction skull melting (ISM) process, Journal of Alloys and Compounds 334 (2002) 261-266.

DOI: 10.1016/s0925-8388(01)01766-2

[2] J. Guo, G. Liu, Y. Su, H. Ding, J. Jia, Evaporation behavior of aluminum during the cold crucible induction skull melting of titanium aluminum alloys, Metallurgical and Materials Transactions B 31B (2000) 837-844.

DOI: 10.1007/s11663-000-0120-1

[3] J. Guo, G. Liu, Y. Su, H. Ding, J. Jia, H. Fu, The critical pressure and impeding pressure of Al evaporation during induction skull melting processing of TiAl, Metallurgical and Materials Transactions A 31A (2002) 3249-3253.

DOI: 10.1007/s11661-002-0311-2

[4] T. Isawa, H. Nakamura, K. Murakami, Aluminum evaporation from titanium alloys in EB hearth melting process, ISIJ International 32 (1992) 607-615.

DOI: 10.2355/isijinternational.32.607

[5] G. Siwiec, Elimination of aluminum during the process of Ti-6Al-4V alloy, smelting in a vacuum induction furnace, Archives of Metallurgy and Materials 57 (2012) 951-956.

DOI: 10.2478/v10172-012-0105-5

[6] L. Blacha, R. Burdzik, A. Smalcerz, T. Matuła, Effects of pressure on the kinetics of manganese evaporation from the OT4, Archives of Metallurgy and Materials 58 (2013) 197-201.

DOI: 10.2478/v10172-012-0173-6

[7] R. Przyłucki, S. Golak, B. Oleksiak, L. Blacha: Influence of an induction furnace's electric parameters on mass transfer velocity in the liquid phase, Metalurgija 51 (2012) 67-70.

[8] R. Przyłucki, S. Golak, B. Oleksiak, L. Blacha: Influence of the geometry of the arrangement inductor-crucible to the velocity of the transport of mass in the liquid metallic phase mixed inductive, Archives of Civil and Mechanical Engineering 11 (2011).

DOI: 10.1016/s1644-9665(12)60181-2

[9] J. Guo, G. Liu, Y. Su, H. Ding, J. Jia, H. Fu, Evaporation of multi-components in Ti-25Al-25Nb melt during induction skull melting process, Transactions of Nonferrous Metals Society of China 12 (2002) 587-591.

[10] S. Semiatin, V. Ivanchenko, S. O. Akhonin, O. M. Ivasishin, Diffusion models for evaporation losses during electron-beam melting of alpha/beta-titanium alloys, Metallurgical and Materials Transactions B 35B (2004) 235-245.

DOI: 10.1007/s11663-004-0025-5