Influence of Modification and Casting Technology on Structure of IN-713C Superalloy Castings

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Abstract

The paper presents the results concerning impact of modification (volume and surface techniques), pouring temperature and mould temperature on stereological parameters of macrostructure in IN713C castings made using post-production scrap. The ability to adjust the grain size is one of the main issues in the manufacturing of different nickel superalloy castings used in aircraft engines. By increasing the grain size one can increase the mechanical properties, like diffusion creep resistance, in higher temperatures. The fine grained castings. on the other hand, have higher mechanical properties in lower temperatures and higher resistance to thermal fatigue. The test moulds used in this study, supplied by Pratt and Whitney Rzeszow, are ordinarily used to cast the samples for tensile stress testing. Volume modification was carried out using the patented filter containing cobalt aluminate. The macrostructure was described using the number of grains per mm2, mean grain surface area and shape index. Obtained results show strong relationship between the modification technique, pouring temperature and grain size. There was no significant impact of mould temperature on macrostructure.

[1] Pucka, G. (1984). Preparing technology of gas turbine blades with adjustable grain size. Materials Engineering. 4-5, 115-119. (in Polish).

[2] Liu, L. Huang, T. & Xiong, Y. (2005). Grain refinement of superalloy K4169 by addition of refineries: cast structure and refinement mechanisms. Materials Science and Engineering. A(394),1-8

[3] Xiong, Y., Du, J., Wie, X., Yang, A. & Liu, L. (2004). Grain refinement of Superalloy IN 718C by the addition of Inoculants. Metallurgical and Materials Transactions A. 35A, 2111-2114.

[4] Xiong, Y., Yang, A., Guo, Y., Liu, W. & Liu, L. (2001). Grain refinement of superalloys K3 and K4169 by the addition of refiners. Science and Technology of Advanced Materials. 2, 13-17.

[5] Zielińska, M., Sieniawski, J. & Wierzbińska, M. (2008). Effect of modification on microstructure and mechanical properties of cobalt casting superalloy. Archives of Metallurgy and Materials. 53(3), 887-893.

[6] Binczyk, F. & Śleziona, J. (2010). Effect of modification on the mechanical properties of IN-713C alloy. Archives of Foundry Engineering. 10(1), 195-198. ISSN (1897-3310)

[7] Binczyk, F. & Śleziona, J. (2010). Mechanical properties and creep resistance behaviour of IN -713C alloy castings. Archives of Foundry Engineering. 10(4), 9-13. ISSN 1897-3310.

[8] Binczyk, F., Śleziona, J. & Gradoń, P. (2011). Modification of the macrostructure of nickel superalloys with cobalt nanoparticles. Composites. 1, 49-55. ISSN 1641-8611.

[9] Binczyk, F. Śleziona, J. & Gradoń, P. (2011). Ceramic filters for bulk inoculation of nickel alloy castings. Archives of Foundry Engineering. 11(special 3), 29-33. ISSN 1897-3310.

[10] Binczyk, F., Śleziona, J., Szymszal, J. & Gradoń, P. (2011). Effect of technological parameters on structure of castings made from IN-713C nickel alloy. Archives of Foundry Engineering. 11(4), 9-13. ISSN 1897-3310.

[11] Bińczyk, F., Śleziona, J., Smoliński, A., Gadzik, E. (2014). PL 218437. Warsaw, Polish Patent Office.

[12] Binczyk, F., Śleziona, J. & Mikuszewski, T. (2010). Effect of repeated remelting on the chemical composition and structure of nickel alloys. Archives of Foundry Engineering. 10(special 1), 189-194. ISNN 1897-3310.

[13] Szala, J. (2001). Application of computer image analysis to quantity the structure of materials. Gliwice: Silesian University of Technology. (in Polish).

Archives of Foundry Engineering

The Journal of Polish Academy of Sciences

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CiteScore 2016: 0.42

SCImago Journal Rank (SJR) 2016: 0.192
Source Normalized Impact per Paper (SNIP) 2016: 0.316

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