Research Article
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Published Online: 13 October 2023

Directed Energy Deposition of Parts with Internal Channels Using Removable Graphite Supports

Publication: 3D Printing and Additive Manufacturing

Abstract

Additive manufacturing (AM) techniques have the potential to produce complex parts, and many of these techniques require the use of support structures to prevent deformations and to minimize thermal effects during the printing process, particularly when building overhangs and internal cavities. However, removing the support structures through postprocessing incurs additional costs and time penalties. Unlike other AM techniques, support structures are not used in directed energy deposition (DED) technique due to its working principle. Therefore, special multiaxis complex path-planning strategies for DED are adopted to print relatively simple overhang geometries. Nevertheless, printing internal channels using this technique can still be challenging or nearly impossible. In this work, a novel DED process using graphite as a support material is proposed for additively manufacturing simple and complex internal channels. The support material is easily removed without requiring extensive machining processes. The results demonstrated that the support material did not negatively impact part quality, and in fact, the presence of different carbides at the interaction zone increased hardness and Young's modulus. Moreover, there were no cracks and or porosity at the support material-part interface. This study is the first of its kind to demonstrate the potential for using graphite as a support material for DED processes in additively manufacturing parts with complex internal channels and overhangs and highlights the need for further research in this area.

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References

1. Jiang J, Xu X, Stringer J. Support structures for additive manufacturing: A review. J Manuf Mater Process 2018;2(4):1–23;
2. Jiang J, Weng F, Gao S, et al. A support interface method for easy part removal in directed energy deposition. Manuf Lett 2019;20:30–33;
3. Hildreth OJ, Nassar AR, Chasse KR, et al. Dissolvable metal supports for 3D direct metal printing. 3D Print Addit Manuf 2016;3(2):91–97;
4. Handa SS. Precipitation of Carbides in a Ni-Based Superalloy. Masters Degree Proj; University West: Trollhättan, Sweden; 2014; pp. 1–33.
5. Oblak JM, Paulonis DF, Duvall DS. Coherency strengthening in Ni base alloys hardened by DO22 γ′ precipitates. Metall Trans 1974;5(1):143–153;
6. Sreekanth S, Ghassemali E, Hurtig K, et al. Effect of direct energy deposition process parameters on single-track deposits of alloy 718. Metals (Basel) 2020;10(1):96;
7. Sundararaman M, Mukhopadhyay P, Banerjee S. Precipitation of the δ-Ni3Nb phase in two nickel base superalloys. Metall Trans A 1988;19(3):453–465;
8. Wei X, Zheng W, Song Z, et al. Strain-induced precipitation behavior of δ phase in Inconel 718 alloy. J Iron Steel Res Int 2014;21(3):375–381.
9. Belan J. GCP and TCP phases presented in nickel-base superalloys. Mater Today Proc 2016;3(4):936–941;
10. Andersson J. Weldability of Precipitation Hardening Superalloys—Influence of Microstructure. Doctor Thesis. Chalmers University of Technology: Gothenburg, 2011; pp. 1–57.
11. Knorovsky GA, Cieslak MJ, Headley TJ, et al. INCONEL 718: A solidification diagram. Metall Trans A 1989;20(10):2149–2158;
12. Sreekanth S, Hurtig K, Joshi S, et al. Influence of laser-directed energy deposition process parameters and thermal post-treatments on Nb-rich secondary phases in single-track Alloy 718 specimens. J Laser Appl 2021;33(2):022024;
13. Chen B, Mazumder J. Role of process parameters during additive manufacturing by direct metal deposition of Inconel 718. Rapid Prototyp J 2017;23(5):919–929;
14. Jiang J, Stringer J, Xu X. Support optimization for flat features via path planning in additive manufacturing. 3D Print Addit Manuf 2019;6(3):171–179;
15. Kazanas P, Deherkar P, Almeida P, et al. Fabrication of geometrical features using wire and arc additive manufacture. Proc Inst Mech Eng Part B J Eng Manuf 2012;226(6):1042–1051;
16. Klocke F, Klink A, Veselovac D, et al. Turbomachinery component manufacture by application of electrochemical, electro-physical and photonic processes. CIRP Ann Manuf Technol 2014;63(2):703–726;
17. Bunker RS. A review of shaped hole turbine film-cooling technology. J Heat Transfer 2005;127(4):441–453;
18. Voisey KT, Clyne TW. Laser drilling of cooling holes through plasma sprayed thermal barrier coatings. Surf Coatings Technol 2004;176(3):296–306;
19. Ekmekci B. Residual stresses and white layer in electric discharge machining (EDM). Appl Surf Sci 2007;253(23):9234–9240;
20. Wang CC, Chow HM, Yang LD, et al. Recast layer removal after electrical discharge machining via Taguchi analysis: A feasibility study. J Mater Process Technol 2009;209(8):4134–4140;
21. Zhang Y, Xu Z, Zhu D, et al. Tube electrode high-speed electrochemical discharge drilling using low-conductivity salt solution. Int J Mach Tools Manuf 2015;92:10–18;
22. Wang W, Zhu D, Qu NS, et al. Electrochemical drilling with vacuum extraction of electrolyte. J Mater Process Technol 2010;210(2):238–244;
23. Zhang Q, Sun SF, Zhang FY, et al. A study on film hole drilling of IN718 superalloy via laser machining combined with high temperature chemical etching. Int J Adv Manuf Technol 2020;106(1–2):155–162;
24. Azizi A, Schiffres SN. Laser Metal Additive Manufacturing on Graphite. In: Solid Freeform Fabrication 2018: Proceedings of the 29th Annual International Solid Freeform Fabrication Symposium—An Additive Manufacturing Conference, SFF 2018, The University of Texas: Austin; 2020; pp. 2315–2324.
25. Ceritbinmez F, Günen A, Gürol U, et al. A comparative study on drillability of Inconel 625 alloy fabricated by wire arc additive manufacturing. J Manuf Process 2023;89:150–169;
26. Oliver WC, Pharr GM. An improved technique for determining hardness and elastic modulus using load and displacement sensing indetation experiments. J Mater Res 1992;7(6):1564–1583.
27. Lee D. Experimental investigation of laser ablation characteristics on nickel-coated beryllium copper. Metals (Basel) 2018;8(4):8–20;
28. Wheeler NS. Review of the nickel-graphite interface. J Compos Technol Res 1990;12(3):177–183;
29. Tashiro M, Kasahara A. Method of bonding graphite to metal. United States Pat 1999;(19):1–5.
30. DebRoy T, Wei HL, Zuback JS, et al. Additive manufacturing of metallic components—Process, structure and properties. Prog Mater Sci 2018;92:112–224;
31. Cj L, Li Y, Tong H, et al. Thinning process of recast layer in hole drilling and trimming by EDM. Proc CIRP 2016;42(ISEM XVIII):575–579;
32. Zhang X, Ren CL, Han H, et al. Theoretical study of the substitutional solute effect on the interstitial carbon in nickel-based alloy. RSC Adv 2017;7(33):20567–20573;
33. Zhang Y, Li Z, Nie P, et al. Carbide and nitride precipitation during laser cladding of Inconel 718 alloy coatings. Opt Laser Technol 2013;52:30–36.
34. Wang Y, Shi J, Lu S, et al. Solution and aging treatments of Inconel 718/TIC nanocomposite from selective laser melting. ASME 2016 11th Int Manuf Sci Eng Conf MSEC 2016;2016:3;
35. Chang L, Sun W, Cui Y, et al. Effect of heat treatment on microstructure and mechanical properties of the hot-isostatic-pressed Inconel 718 powder compact. J Alloys Compd 2014;590:227–232;
36. Ma M, Wang Z, Zeng X. Effect of energy input on microstructural evolution of direct laser fabricated IN718 alloy. Mater Charact 2015;106:420–427;
37. Moradi M, Pourmand Z, Hasani A, et al. Direct laser metal deposition (DLMD) additive manufacturing (AM) of Inconel 718 superalloy: Elemental, microstructural and physical properties evaluation. Optik (Stuttg) 2022;259:1–27;
38. Tian Y, McAllister D, Colijn H, et al. Rationalization of microstructure heterogeneity in INCONEL 718 builds made by the direct laser additive manufacturing process. Metall Mater Trans A 2014;45(10):4470–4483;
39. Zuback JS, DebRoy T. The hardness of additively manufactured alloys. Materials (Basel) 2018;11(11):1–41;
40. Li SH, Kumar P, Chandra S, et al. Directed energy deposition of metals: Processing, microstructures, and mechanical properties. Int Mater Rev 2022;60:1–43;
41. Brennan MC, Keist JS, Palmer TA. Defects in metal additive manufacturing processes. J Mater Eng Perform 2021;30(7):4808–4818;

Information & Authors

Information

Published In

cover image 3D Printing and Additive Manufacturing
3D Printing and Additive Manufacturing

History

Published online: 13 October 2023

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Authors

Affiliations

Dilara Celik [email protected]
Faculty of Engineering and Natural Sciences, Material Science and Nano Engineering, Sabanci University, Istanbul, Turkey.
Integrated Manufacturing Technologies Research and Application Center, Material Science and Nano Engineering, Sabanci University, Istanbul, Turkey.
Ali Karaca
Integrated Manufacturing Technologies Research and Application Center, Material Science and Nano Engineering, Sabanci University, Istanbul, Turkey.
Faculty of Engineering and Natural Sciences, Manufacturing Engineering, Sabanci University, Istanbul, Turkey.
Integrated Manufacturing Technologies Research and Application Center, Material Science and Nano Engineering, Sabanci University, Istanbul, Turkey.
Faculty of Engineering and Natural Sciences, Manufacturing Engineering, Sabanci University, Istanbul, Turkey.

Notes

Address correspondence to: Dilara Çelik, Department of Material Science and Nano Engineering, Faculty of Engineering and Natural Sciences, Sabancı University, Orta Mah, 34956 Tuzla/İstanbul, Turkey [email protected]

Authors' Contributions

D.Ç.: conceptualization, methodology, investigation, data curation, writing—original draft, visualization. A.K.: formal analysis, helps on writing the roundness and centricity part. B.K.: supervision, writing—review and editing.

Author Disclosure Statement

The authors declare no conflict of interest.

Funding Information

The financial support provided by the Scientific and Technological Research Council of Turkey (TUBITAK 2244) under the grant number 118C044 is greatly acknowledged. This research received no external funding.

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