Abstract
In this study, a nickel-based superalloy Inconel 718 material was developed through direct metal laser sintering process. To enhance the mechanical properties, printed material was heat-treated at two different conditions in the combination of solution and ageing. The transformations of microstructure from original anisotropic phase were studied using optical microscope. The changes in mechanical properties were evaluated. The hardness of the heat-treated samples obtained is 35HRC and 39HRC for the heat treatment plan at 1100 °C + 845 °C and 980 °C + 720 °C (solution + ageing), respectively. Further, micro-holes were machined on these two material samples using spark erosion micro-machining or micro-electric discharge machining (µEDM) process. Applied voltage, capacitance and material hardness were three major variable parameters. Experiments were performed with hollow tungsten carbide rod of 300 µm in diameter as a drill tool rotating at a speed of 1500 rpm for a constant machining time of 30 min. Optical and scanning electron micrographs were used to analyse the hole quality and therefore the performance of µEDM. Perfect concentric drill hole was produced with 35HRC sample than the other. Weld spatters and metal drops were found around the surface of 39HRC sample. The range of drill hole varied to a maximum of ϕ385 µm in low-hardness and ϕ400 µm in high-hardness samples. The depth of drill hole was maximum with high hard sample at 100 V and 100 nF process condition. Light spectroscope-based roughness characterization revealed that the minimum surface roughness measured was 6.946 µm in low hard and 9.829 µm in high hard material.
Similar content being viewed by others
References
Reed R C, The Superalloys Fundamentals and Applications, Cambridge University Press, Cambridge (2006) p 26.
Donachie M J, and Donachie S J, Superalloys: A Technical Guide. 2nd Ed., ASTM International, Materials Park (2002) p 76.
Lacaze J, and Hazotte A, Texture Microstruct13 (1990) 1.
Murr L E, Gaytan S M, Ramirez D A, Martinez E, Hernandez J, Amato K N, Shindo P W, Medina F R, and Wicker RB, J Mater Sci Technol28 (2012) 14.
Herzog D, Seyda V, Wycisk E, and Emmelmann C, Acta Mater117 (2016) 375.
Galati M, and Iuliano L, Addit Manuf19 (2018) 15.
Moussaoui K, Rubio W, Mousseigne M, Sultan T, and Rezai F, Mater Sci Eng A735 (2018) 182.
Gribbin S, Bicknell J, Jorgensen L, Tsukrov I, and Knezevic M, Int J Fatigue93 (2016) 156.
Axinte D A, Karpuschewski B, Kong M C, Beaucamp A T, Anwar S, Miller D, and Petzel M, CIRP Ann Manuf Technol63 (2014) 751.
Uthayakumar M, Adam Khan M, Thirumalai Kumaran S, Slota A, and Zajac J, Mater Manuf Process31 (2015) 1733.
Dabade U A, and Karidkar S S, Procedia CIRP41 (2016) 886.
Kuppan P, Rajadurai A, and Narayanan S, Int J Adv Manuf Technol38 (2008) 74.
Li L, Li ZY, Wei XT, and Cheng X, Mater Manuf Process30 (2015) 968.
Dhanabalan S, Sivakumar K, and Narayanan C S, Mater Manuf Process29 (2014) 253.
Sultan T, Kumar A, and Gupta R D, Int J Manuf Eng2014 (2014) 1.
Kumar A, Maheshwari S, Sharma C, and Beri N, Mater Manuf Process26 (2011) 1011.
Jafarian F, Masoudi S, Soleimani H, and Umbrello D, Mater Manuf Process33 (2018) 1020.
Herbert C, Axinte D, Hardy M, and Brown P D, Mater Manuf Process16 (2012) 40.
Sochalski-Kolbus L M, Payzant E A, Cornwell P A, Watkins T R, Babu S S, Dehoff R R, Lorenz M, Ovchinnikova O, and Duty C, Metall Mater Trans A46 (2015) 1419.
Nicoletto G, Konečná R, Frkáň M, and Rivaa E, Int J Fatigue16 (2018) 140.
Delgado J, Ciurana J, Rodríguez C A, Int J Adv Manuf Technol60 (2012) 601.
Wu X, Mater Sci Technol23 (2017) 631.
Farber B, Small K A, Allen C, Causton R J, Nichols A, Simbolick J, and Taheri M L, Mater Sci Eng A712 (2018) 539.
Kuo Y L, Horikawa S, and Kakehi K, Mater Des116 (2017) 411.
Keshavarzkermani A, Sadowski M, and Ladani L, J Alloys Compd736 (2018) 297.
Zhang Y, Yang L, Chen T, Zhang W, Huang X, and Dai J, Opt Laser Technol97 (2017) 172.
D’Urso G, Maccarini G, and Ravasio C, Int J Adv Manuf Technol72 (2014) 1287.
Lin Z, Guo Z, Jiang S, Liu G, and Liu J, Adv Compos Lett27 (2018) 193.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Khan, M.A., Gupta, K. On Heat Treatment and Surface Characterization of Spark Eroded Nickel-Based Superalloy Developed by Additive Manufacturing. Trans Indian Inst Met 73, 429–439 (2020). https://doi.org/10.1007/s12666-019-01857-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12666-019-01857-z