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Role of Aluminide coating degradation on Inconel 713 LC used for Compressor Turbines (CT) of Short-haul Aircrafts

Published online by Cambridge University Press:  20 February 2018

Joshua K. Ngoret  and
Venkata P. Kommula
Joshua K. Ngoret*
Affiliation:
Department of Mechanical Engineering, University of Botswana, Private Bag0061, Gaborone. Department of Mechanical Engineering, Jomo Kenyatta University of Agriculture and Technology, 62000-00200, Nairobi, Kenya.
Venkata P. Kommula
Affiliation:
Department of Mechanical Engineering, University of Botswana, Private Bag0061, Gaborone.
*
*Corresponding author: Email: [email protected]; Tel: +26776813894/+254726557186
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Abstract

This paper investigates the role degradation of protective diffusion aluminide coating on Inconel 713LC used for CT blades of short-haul aircraft fleet played in having the blades prematurely retired from service at 6378 hours, as opposed to their pre-set service time of 10000 hours. The blade samples were subjected to various examinations; X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyse at the; tips, airfoil, as well as the base, transverse and longitudinal, sectioned and unsectioned. As affirmed by both the transverse and longitudinal sections examinations, it was established that thermal attack leading to deterioration of the coating was greater at the tip and airfoils of the blades (the hotter zones) and lesser towards the bases (colder zones). As a result, severe degradation of the core material at the tips and airfoils compared to the bases and more prevalent at the leading edges than trailing edges at the tips. The results further suggest that both active outward Ni diffusion and inward Al diffusion can coexist during exploitation of the blades in service. The study illustrates the role played by the aluminide coating in early failure of CT blades with the aim of bettering the surface coatings and enhancing coating technologies, managing CT blade material monitoring as well as to give insights on advancing CT blades maintenance practices.

Keywords

coatingmicrostructurescanning electron microscopy (SEM)x-ray diffraction (XRD)x-ray fluorescence
Type
Articles
Information
MRS Advances , Volume 3 , Issue 38: African Materials Research Society 2017 , 2018 , pp. 2281 - 2296
Copyright
Copyright © Materials Research Society 2018 

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References

Kear, B. and Thompson, E.: Aircraft gas turbine materials and processes. Science 208, 847–856 (1980).CrossRefGoogle ScholarPubMed
Noda, N.: Thermal stresses in functionally graded materials. Journal of Thermal Stresses 22, 477–512 (1999).CrossRefGoogle Scholar
Sieniawski, J.: Nickel and titanium alloys in aircraft turbine engines. Advances in Manufacturing Science and Technology 27, 23–33 (2003).Google Scholar
Tamarin, Y.: Protective coatings for turbine blades, (ASM international 2002).Google Scholar
Sudhangshu, B.: High temperature coatings, (Butterworth-Heinnemann, Oxford 2007).Google Scholar
Hetmańczyk, M., Swadźba, L., and Mendala, B.: Advanced materials and protective coatings in aero-engines application. Journal of Achievements in Materials and Manufacturing Engineering 24, 372–381 (2007).Google Scholar
Choux, C., Kulińska, A., and Chevalier, S.: High temperature reactivity of nickel aluminide diffusion coatings. Intermetallics 16, 1–9 (2008).CrossRefGoogle Scholar
Bai, C.-Y., Luo, Y.-J., and Koo, C.-H.: Improvement of high temperature oxidation and corrosion resistance of superalloy IN-738LC by pack cementation. Surface and Coatings Technology 183, 74–88 (2004).CrossRefGoogle Scholar
Onyszko, A. and Kubiak, K.: Method for production of single crystal superalloys turbine blades. Archives of Metallurgy and materials 54, 765–771 (2009).Google Scholar
Zielińska, M., Kubiak, K., and Sieniawski, J.: Surface modification, microstructure and mechanical properties of investment cast superalloy. Journal of Achievements in Materials and Manufacturing Engineering 35, 55–62 (2009).Google Scholar
Yavorska, M., Poręba, M., and Sieniawski, J.: Development of microstructure of aluminide layer on Ni-base superalloys in the low-activity CVD process. Materials Engineering 6, 749–752 (2008).Google Scholar
Poręba, M., Ziaja, W., and Kubiak, K.: Microstructure and heat resistance of aluminide coating developed on Rene 77 superalloy in low activity CVD process. Materials Engineering 6, 745–748 (2008).Google Scholar
Zielińska, M., Sieniawski, J., Yavorska, M., and Motyka, M.: Influence of chemical composition of nickel based superalloy on the formation of aluminide coatings. Archives of metallurgy and materials 56, 193–197 (2011).CrossRefGoogle Scholar
DeMasi-Marcin, J. T. and Gupta, D. K.: Protective coatings in the gas turbine engine. Surface and Coatings Technology 68, 1–9 (1994).CrossRefGoogle Scholar
Mumm, D. R., Watanabe, M., Evans, A., and Pfaendtner, J.: The influence of test method on failure mechanisms and durability of a thermal barrier system. Acta Materialia 52, 1123–1131 (2004).CrossRefGoogle Scholar
Nicholls, J.: Advances in coating design for high-performance gas turbines. MRS bulletin 28, 659–670 (2003).CrossRefGoogle Scholar
Fernandes, F., Lopes, B., Cavaleiro, A., Ramalho, A., and Loureiro, A.: Effect of arc current on microstructure and wear characteristics of a Ni-based coating deposited by PTA on gray cast iron. Surface and Coatings Technology 205, 4094–4106 (2011).CrossRefGoogle Scholar
Fernandes, F., Cavaleiro, A., and Loureiro, A.: Oxidation behavior of Ni-based coatings deposited by PTA on gray cast iron. Surface and Coatings Technology 207, 196–203 (2012).CrossRefGoogle Scholar
Gatto, A., Bassoli, E., and Fornari, M.: Plasma Transferred Arc deposition of powdered high performances alloys: process parameters optimisation as a function of alloy and geometrical configuration. Surface and Coatings Technology 187, 265–271 (2004).CrossRefGoogle Scholar
Stolle, R.: Conventional and advanced coatings for turbine airfoils. Journal of MTU Aero Engines (2009).Google Scholar
Hardwicke, C. U. and Lau, Y.-C.: Advances in thermal spray coatings for gas turbines and energy generation: a review. Journal of Thermal Spray Technology 22, 564–576 (2013).CrossRefGoogle Scholar
Juliš, M., Obrtlík, K., Pospíšilová, S., Podrábský, T., and Poláka, J.: Effect of Al-Si diffusion coating on the fatigue behavior of cast Inconel 713LC at 800 C. Procedia Engineering 2, 1983–1989 (2010).CrossRefGoogle Scholar
Lee, K. N.: Protective coatings for gas turbines, (Section2006).Google Scholar
Davis, J. R.: ASM specialty handbook: heat-resistant materials, (Asm International1997).Google Scholar
Evans, A. G., Mumm, D., Hutchinson, J., Meier, G., and Pettit, F.: Mechanisms controlling the durability of thermal barrier coatings. Progress in materials science 46, 505–553 (2001).CrossRefGoogle Scholar
Nijdam, T., Marijnissen, G., Vergeldt, E., Kloosterman, A., and Sloof, W.: Development of a pre-oxidation treatment to improve the adhesion between thermal barrier coatings and NiCoCrAlY bond coatings. Oxidation of Metals 66, 269–294 (2006).CrossRefGoogle Scholar
Struers. (2017, 30/08). Materialographic Consumables Catalogue. Available: http://www.masontechnology.ie/files/documents/stru70.pdfGoogle Scholar
Kadachi, A. N., and Mohammad, A. A.: Limits of detection in XRF spectroscopy. X-Ray Spectroscopy 41, 350–354 (2012).CrossRefGoogle Scholar
McLean, M.: Directionally solidified materials for high temperature service(Book), in London, Metals Society, 1983, 345 p (1983).Google Scholar