Effect of ring-shaped beam profiles in LPBF of Nickel alloy 718 on the surface roughness
Ersilia Cozzolino, Austin Tiley, John Middendorf, Antonello Astarita
Abstract. Laser Powder Bed Fusion (LPBF) is an Additive Manufacturing (AM) process which uses a laser, traditionally having a Gaussian distribution, to selectively melts the metallic powders thus allowing the printing of customized parts having complex geometries. Despite the numerous advantages offered by the LPBF, efficiency and productivity of the process represent crucial challenges which limit its large-scale production. In this regard, the use of innovative beam shapes, such as the ring one, is starting to be deeply investigated to potentially revolutionize metal AM by improving quality, efficiency and sustainability of the processes. Nevertheless, very few studies exist in the literature investigating the effect of the use of laser having ring-beam shaped profile on both quality and efficiency of the LPBF process. This work aims to fill this gap of knowledge, thus exploring and discussing the effect of the ring contribution in the LPBF process on both surface roughness and productivity of Nickel alloy 718 parts.
Keywords
Laser Powder Bed Fusion, Productivity, Ring Laser, Surface Roughness
Published online 5/7/2025, 7 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Ersilia Cozzolino, Austin Tiley, John Middendorf, Antonello Astarita, Effect of ring-shaped beam profiles in LPBF of Nickel alloy 718 on the surface roughness, Materials Research Proceedings, Vol. 54, pp 238-244, 2025
DOI: https://doi.org/10.21741/9781644903599-26
The article was published as article 26 of the book Material Forming
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] E. Hosseini and V. A. Popovich, “A review of mechanical properties of additively manufactured Inconel 718,” Addit Manuf, vol. 30, no. February, p. 100877, 2019. https://doi.org/10.1016/j.addma.2019.100877
[2] W. E. Frazier, “Metal additive manufacturing: A review,” J Mater Eng Perform, vol. 23,no. 6, pp. 1917–1928, 2014. https://doi.org/10.1007/s11665-014-0958-z
[3] K. Kellens, R. Mertens, D. Paraskevas, W. Dewulf, and J. R. Duflou, “Environmental Impact of Additive Manufacturing Processes: Does AM Contribute to a More Sustainable Way of Part Manufacturing?,” Procedia CIRP, vol. 61, no. Section 3, pp. 582–587, 2017. https://doi.org/10.1016/j.procir.2016.11.153
[4] G. Technologies and A. Manufacturing, “Metal Additive Manufacturing Gas Solutions for Sustainable”.
[5] A. W. Boeing and C. Marcham, “Environmental Advantages in Additive Manufacturing,” Professional Safety/ASSP, vol. 65, no. 1, pp. 34–38, 2020, [Online]. Available: https://commons.erau.edu/publication
[6] T. Kurzynowski, E. Chlebus, B. Kuźnicka, and J. Reiner, “Parameters in selective laser melting for processing metallic powders,” High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications, vol. 8239, no. February, p. 823914, 2012. https://doi.org/10.1117/12.907292
[7] E. Cozzolino, A. Tiley, A. J. Ramirez, A. Astarita, and H. Edward D., “Energy Efficiency influence of Gaussian and Ring- shaped beam profiles for LPBF,” pp. 1–25, 2023, [Online]. Available: https://orcid.org/0009-0007-6609-0722
[8] C. Tenbrock et al., “Influence of keyhole and conduction mode melting for top-hat shaped beam profiles in laser powder bed fusion,” J Mater Process Technol, vol. 278, p. 116514, Apr. 2020. https://doi.org/10.1016/J.JMATPROTEC.2019.116514
[9] A. F. H. Kaplan, “Modelling the Primary Impact of an Yb:Fibre Laser Beam Profile on the Keyhole Front,” Phys Procedia, vol. 12, no. PART 1, pp. 627–637, Jan. 2011. https://doi.org/10.1016/J.PHPRO.2011.03.079
[10] J. Grünewald, F. Gehringer, M. Schmöller, and K. Wudy, “Influence of Ring-Shaped Beam Profiles on Process Stability and Productivity in Laser-Based Powder Bed Fusion of AISI 316L,” pp. 1–18, 2021.
[11] “High-productivity laser powder-bed fusion tools enabled by AFX fiber lasers with rapidly tunable beam quality.”
[12] B. Stegman et al., “Volumetric energy density impact on mechanical properties of additively manufactured 718 Ni alloy,” Materials Science and Engineering: A, vol. 854, p. 143699, Sep. 2022. https://doi.org/10.1016/J.MSEA.2022.143699
