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Interfacial Characteristics Investigation for One-Step EDM Drilling of Cooling Holes in TBCs

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Abstract

In this study, the one-step electrical discharge machining of inclined cooling holes is performed in thermal-barrier-coated nickel-based superalloys via the assisting electrode method. The effects of the process parameters, including the inclination angle, peak current, pulse duration, and duty cycle, on interfacial characteristics of cooling holes were investigated. The research results are as follows: After machining, the hardness of TBCs increases slightly and the adhesion strength of ceramic coating has a slight reduction. Delamination prevailingly appears at the ceramic coating/bonding coating interface, and its length at the trailing edge is greater than that at the leading edge. Increasing either the discharge energy or the duty cycle also aggravates the severity of the delamination. Under an excessive peak current of 22.5 A, the complete spalling of the ceramic coating occurs in the vicinity of the holes. Additionally, a reduction in the inclination angle results in a significant increase in delamination cracking and poorer interface integrity. The interfacial microstructure features of the holes vary with the inclination angle. The large-scale spalling of ceramic coating is prone to occur at the trailing edge when using an inclination angle of 30°. The spattering is susceptible to appear at the entrance of the holes under inclination angles of 60° and 75°, and its composition is primarily Ni, C, Zr, Cr, Nb, Fe, and Cu.

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References

  1. Z.Y. Li, X.T. Wei, Y.B. Guo, and M.P. Sealy, State-of-Art, Challenges, and Outlook on Manufacturing of Cooling Holes for Turbine Blades, Mach. Sci. Technol., 2015, 19(3), p 361–399

    Article  CAS  Google Scholar 

  2. L. Li, Z.Y. Li, X.T. Wei, and X. Cheng, Machining Characteristics of Inconel 718 by Sinking-EDM and Wire-EDM, Mater. Manuf. Process., 2015, 30(8), p p968–p973

    Article  Google Scholar 

  3. S. Dhanabalan, K. Sivakumar, and C.S. Narayanan, Analysis of Form Tolerances in Electrical Discharge Machining Process for Inconel 718 and 625, Mater. Manuf. Process., 2014, 29(3), p p253–p259

    Article  Google Scholar 

  4. Y.H. Liu, Y.Z. Zhang, R.J. Ji, B.P. Cai, F. Wang, X.J. Tian, and X. Dong, Experimental Characterization of Sinking Electrical Discharge Machining Using Water in Oil Emulsion as Dielectric, Mater. Manuf. Process., 2013, 28(14), p 355–363

    Article  CAS  Google Scholar 

  5. A.C. Karaoglanli, A. Turk, I. Ozdemir, and F. Ustel, Comparison of Oxidation and Thermal Shock Performance of Thermal Barrier Coatings, Mater. Manuf. Process., 2015, 30(6), p 717–723

    Article  CAS  Google Scholar 

  6. S.L. Rogerio and R.M. Basil, Insights on the High-Temperature Operational Limits of ZrO2-Y2O3 TBCs Manufactured via Air Plasma Spray, J. Mater. Eng. Perform., 2017, 26(3), p p1272–p1282

    Article  Google Scholar 

  7. B. Lauwers, J.P. Kruth, W. Liu, W. Eeraerts, B. Schacht, and P. Bleys, Investigation of Material Removal Mechanisms in EDM of Composite Ceramic Materials, J. Mater. Process. Technol., 2004, 149(1–3), p 347–352

    Article  CAS  Google Scholar 

  8. B. Shiner, Fiber Lasers Poised to Impact Aerospace Component Drilling, Laser Focus World, 2013, 49(8), p p53–p55

    Google Scholar 

  9. B. Adelmann and R. Hellmann, Rapid Micro Hole Laser Drilling in Ceramic Substrates Using Single Mode Fiber Laser, J. Mater. Process. Technol., 2015, 221, p p80–p86

    Article  Google Scholar 

  10. D.K. Das and T.M. Pollock, Femtosecond Laser Machining of Cooling Holes in Thermal Barrier Coated CMSX4 Superalloy, J. Mater. Process. Technol., 2009, 209(15–16), p p5661–p5668

    Article  Google Scholar 

  11. C.A. Biffi and B. Previtali, Spatter Reduction in Nanosecond Fibre Laser Drilling Using an Innovative Nozzle, Int. J. Adv. Manuf. Technol., 2013, 66(9), p p1231–p1245

    Article  Google Scholar 

  12. A. Corcoran, L. Sexton, B. Seaman, P. Ryan, and G. Byrne, The Laser Drilling of Multi-layer Aerospace Material System, J. Mater. Process. Technol., 2002, 123(1), p p100–p106

    Article  Google Scholar 

  13. D.K. Das, J.P. McDonald, S.M. Yalisove, and T.M. Pollock, Depth-Profiling Study of a Thermal Barrier Coated Superalloy Using Femtosecond Laser-Induced Breakdown Spectroscopy, Spectrochim. Acta B, 2008, 63(1), p p27–p36

    Article  Google Scholar 

  14. N. Mohri, Y. Fukuzawa, T. Tani, T. Saito, N. Saito, and K. Furutani, Assisting Electrode Method for Machining Insulating Ceramics, CIRP Ann. Manuf. Technol., 1996, 45(1), p 201–204

    Article  Google Scholar 

  15. G. Kucukturk and C. Cogun, A New Method for Machining of Electrically Nonconductive Workpieces Using Electric Discharge Machining Technique, Mach. Sci. Technol., 2010, 14(2), p 189–207

    Article  CAS  Google Scholar 

  16. T. Tani, Y. Fukuzawa, N. Mohri, N. Saito, and M. Okada, Machining Phenomena in WEDM of Insulating Ceramics, J. Mater. Process. Technol., 2004, 149(1–3), p p124–p128

    Article  Google Scholar 

  17. Y. Fukuzawa, N. Mohri, H. Gotoh, and T. Tani, Three-Dimensional Machining of Insulating Ceramics Materials with Electrical Discharge Machining, Trans. Nonferrous Metals Soc. China, 2009, 19(1), p p150–p156

    Article  Google Scholar 

  18. Y.F. Guo, P.J. Hou, D.X. Shao, Z.F. Li, L. Wang, and L. Tang, High-Speed Wire Electrical Discharge Machining of Insulating Zirconia with a Novel Assisting Electrode, Mater. Manuf. Process., 2014, 29(5), p 526–531

    Article  CAS  Google Scholar 

  19. F. Zeller, T. Hösel, C. Müller, and H. Reinecke, Microstructuring of Non-conductive Silicon Carbide by Electrical Discharge Machining, Microsyst. Technnol., 2014, 20(10–11), p 1875–1880

    Article  CAS  Google Scholar 

  20. Y.F. Guo, G.W. Zhang, L. Wang, and Y.F. Hu, Optimization of Parameters for EDM Drilling of Thermal-Barrier-Coated Nickel Superalloys Using Gray Relational Analysis Method, Int. J. Adv. Manuf. Technol., 2016, 83(9–12), p 1595–1605

    Article  Google Scholar 

  21. K. Albinski, K. Musiol, A. Miernikiewicz, S. Labuz, and M. Malota, Plasma Temperature in Electro-discharge Machining, Plasma Sources Sci. Technol., 1996, 5(4), p 736–742

    Article  CAS  Google Scholar 

  22. J.E. Abu Qudeiri, A.H.I. Mourad, A. Ziout, M.H. Abidi, and A. Elkaseer, Electric Discharge Machining of Titanium and Its Alloys: Review, Int. J. Adv. Manuf. Technol., 2018, 96(1–4), p 1319–1339

    Google Scholar 

  23. M.R. Shabgard, A. Gholipoor, and H. Baseri, A Review on Recent Developments in Machining Methods Based on Electrical Discharge Phenomena, Int. J. Adv. Manuf. Technol., 2016, 87(5–8), p 2081–2097

    Article  Google Scholar 

  24. C.S. Trueman and J. Huddleston, Material Removal by Spalling During EDM of Ceramics, J. Eur. Ceram. Soc., 2000, 20(10), p 1629–1635

    Article  CAS  Google Scholar 

  25. L. Yang, Q.X. Liu, Y.C. Zhou, W.G. Mao, and C. Lu, Finite Element Simulation on Thermal Fatigue of a Turbine Blade with Thermal Barrier Coatings, J. Mater. Process. Technol., 2014, 30(4), p 371–380

    Google Scholar 

  26. K.T. Voisey and T.W. Clyne, Laser Drilling of Cooling Holes Through Plasma Sprayed Thermal Barrier Coatings, Surf. Coat. Technol., 2004, 176(3), p 296–306

    Article  CAS  Google Scholar 

  27. H.K. Sezer and L. Li, Mechanisms of Acute Angle Laser Drilling Induced Thermal Barrier Coating Delamination, J. Manuf. Sci. Eng. Trans. ASME., 2009, 131(5), p 611–623

    Article  Google Scholar 

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Acknowledgments

This research is supported by Heilongjiang Province Nature Science Foundation (E2016037), Harbin Innovation Fund (2015RAXXJ026), and National Natural Science Foundation of China (Grant No. 51875132).

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Authors and Affiliations

  1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China

    Li Wang, Guanxin Chi & Yongfeng Guo

  2. School of Energy and Civil Engineering, Harbin University of Commerce, Harbin, 150001, People’s Republic of China

    Lan Chen

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  1. Li Wang
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  2. Guanxin Chi
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Correspondence to Yongfeng Guo.

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Wang, L., Chi, G., Chen, L. et al. Interfacial Characteristics Investigation for One-Step EDM Drilling of Cooling Holes in TBCs. J. of Materi Eng and Perform 27, 6719–6728 (2018). https://doi.org/10.1007/s11665-018-3728-5

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  • DOI: https://doi.org/10.1007/s11665-018-3728-5

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