Rapid L-PBF Printing of IN718 Coupled with HIP-Quench: A Faster Approach to Combine Manufacturing and Heat Treatment in a Nickel-Based Alloy

Rapid L-PBF Printing of IN718 Coupled with HIP-Quench: A Faster Approach to Combine Manufacturing and Heat Treatment in a Nickel-Based Alloy

Emilio Bassini, Giulio Marchese, Davide Grattarola, Pietro A. Martelli, Sara Biamino, Daniele Ugues

Abstract. Additive manufacturing has been attracting more and more interest in recent years. Researchers are constantly involved in enhancing component quality by tailoring the printing parameters, increasing the lead time and decreasing overall productivity. Rapid L-PBF printing is becoming an appealing strategy to make the components manufacturing faster. However, a rapid building strategy will likely cause a higher density of internal flaws that will be healed during the Hot Isostatic Pressing (HIP) cycle. In this work, Inconel 718 was L-PBF printed with two different strategies: The first consisted in creating a dense 1mm shell leaving loosened powders in the core; the latter used two sets of printing parameters for the 1mm shell and the core, respectively. The two strategies lead to 60 and 45% time reduction, respectively. Secondly, full densification and porosity elimination were achieved using a HIP-quench approach, which combines a fast-cooling step at the end of the HIP cycle, eliminating the need for a further annealing treatment. This work shows the results presenting the final microstructures and the retained flaw. Finally, the microstructural degree of recrystallization was also assessed via EBSD analysis.

Keywords
Laser Powder Bed Fusion (L-PBF), Nickel-Based Alloys, Inconel 718, Heat Treatment, HIP-Quench, Rapid Cooling

Published online 12/8/2023, 7 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Emilio Bassini, Giulio Marchese, Davide Grattarola, Pietro A. Martelli, Sara Biamino, Daniele Ugues, Rapid L-PBF Printing of IN718 Coupled with HIP-Quench: A Faster Approach to Combine Manufacturing and Heat Treatment in a Nickel-Based Alloy, Materials Research Proceedings, Vol. 38, pp 48-54, 2023

DOI: https://doi.org/10.21741/9781644902837-8

The article was published as article 8 of the book Hot Isostatic Pressing

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] D. Herzog, K. Bartsch, B. Bossen, Productivity optimization of laser powder bed fusion by hot isostatic pressing, Additive Manufacturing. 36 (2020) 101494. https://doi.org/10.1016/j.addma.2020.101494
[2] E. Bassini, A. Sivo, P.A. Martelli, E. Rajczak, G. Marchese, F. Calignano, S. Biamino, D. Ugues, Effects of the solution and first aging treatment applied to as-built and post-HIP CM247 produced via laser powder bed fusion (LPBF), Journal of Alloys and Compounds. 905 (2022). https://doi.org/10.1016/j.jallcom.2022.164213
[3] L. Chang, W. Sun, Y. Cui, R. Yang, Preparation of hot-isostatic-pressed powder metallurgy superalloy Inconel 718 free of prior particle boundaries, Materials Science and Engineering A. 682 (2017) 341–344. https://doi.org/10.1016/j.msea.2016.11.031
[4] A. du Plessis, B. Yelamanchi, C. Fischer, J. Miller, C. Beamer, K. Rogers, P. Cortes, J. Els, E. MacDonald, Productivity enhancement of laser powder bed fusion using compensated shelled geometries and hot isostatic pressing, Advances in Industrial and Manufacturing Engineering. 2 (2021) 100031. https://doi.org/10.1016/j.aime.2021.100031
[5] W. Wang, Z. Chen, W. Lu, F. Meng, T. Zhao, Heat treatment for selective laser melting of Inconel 718 alloy with simultaneously enhanced tensile strength and fatigue properties, Journal of Alloys and Compounds. 913 (2022) 165171. https://doi.org/10.1016/j.jallcom.2022.165171
[6] R. Barros, F.J.G. Silva, R.M. Gouveia, A. Saboori, G. Marchese, S. Biamino, A. Salmi, E. Atzeni, Laser Powder Bed Fusion of Inconel 718: Residual Stress Analysis Before and After Heat Treatment, Metals. (2019). https://doi.org/10.3390/met9121290
[7] G.A. Rao, M. Srinivas, D.S. Sarma, Effect of oxygen content of powder on microstructure and mechanical properties of hot isostatically pressed superalloy Inconel 718, Materials Science and Engineering A. 435–436 (2006) 84–99. https://doi.org/10.1016/j.msea.2006.07.053