Laser Powder Bed Fusion (L-PBF) for Cellular Structures Formed by a Heterogeneous Skeleton

Abstract:

Cellular structures such as lattice or triply periodic minimal surfaces (TPMS) present interesting applications in different industry sectors due to their high specific strength (the ratio strength/weight), elastic modulus and energy absorption. Some applications focus on new geometries for heat exchangers due to a higher cooling performance. In addition, different sectors demand lighter materials and structures maintaining component mechanical properties but reducing its weight, which is the case of microstructures. Microstructures composed by rigid skeletons are able to maintain the global component stiffness. The main challenge is designing with optimized microelements size, shape, and topology. The internal cavities and complex geometries of these parts are an impossible barrier for most of the manufacturing processes. Thus, one of the most suitable processes for these types of components is Additive Manufacturing, yet these microstructures formed by a heterogeneous skeleton with cavities is still a real challenge. In this work, different case studies for microstructures manufactured by Laser Powder Bed Fusion (L-PBF) are presented and both, manufacturing process parameters and components analysis, are performed.

• Periodical: Key Engineering Materials (Volume 958)
• Pages: 149-156
• DOI: https://doi.org/10.4028/p-J1VuRY
• Online since: October 2023
• Authors: Haizea González Barrio*, Amaia Calleja Ochoa, Gaizka Gómez Escudero, Sarvesh Mishra, Maialen Martinez de Aguirre, Aitzol Lamikiz Mentxaka, Luis Norberto López de Lacalle
• Keywords: Additive Manufacturing, Cellular Structures, Laser Powder Bed Fusion, Mechanical Properties

References

[1] L.J. Gibson, M.F. Ashby, Cellular Solids: Structure and Properties, Cambridge University Press, Cambridge, 1991.

[2] D. Bhate, Four Questions in Cellular Material Design. Materials 12 (2019) 1060.

[3] W. Tao, M.C. Leu, Design of lattice structure for additive manufacturing. In Proceedings of the 2016 International Symposium on Flexible Automation Cleveland (ISFA 2016), Cleveland, OH, USA, August 2016, 326–332.

DOI: 10.1109/isfa.2016.7790182

[4] C. Pan, Y. Han, J. Lu, Design and Optimization of Lattice Structures: A Review. Applied Sciences, 10:18 (2020) 6374.

[5] Baltej Singh Rupal, Xiuhui Li, Hamid Reza Zareie Rajani, Zengtao Chen, Ahmed Jawad Qureshi, Porosity and Shape Deviation Analysis of Lattice Structures Manufactured Using Laser Powder Bed Fusion Process, Procedia CIRP, Volume 114, 2022, Pages 48-53, ISSN 2212-8271.

DOI: 10.1016/j.procir.2022.10.007

[6] Markl M, Körner C. Multiscale Modeling of Powder Bed-Based Additive Manufacturing. Annu Rev Mater Res 2016;46:93–123.

DOI: 10.1146/annurev-matsci-070115-032158

[7] JD. Pérez-Ruiz, L.N. López de Lacalle, G. Urbikain, O. Pereira, S. Martínez, J. Bris. On the relationship between cutting forces and anisotropy features in the milling of LPBF Inconel 718 for near net shape parts. Int J Mach Tools Manuf (2021) 170.

DOI: 10.1016/j.ijmachtools.2021.103801

[8] A. Calleja, G. Urbikain, H. González, I. Cerrillo, R. Polvorosa, A. Lamikiz, Inconel®718 superalloy machinability evaluation after laser cladding additive manufacturing process. Int. J. Adv. Manuf. Technol., 97 (2018) 2873–2885.

DOI: 10.1007/s00170-018-2169-5

[9] J.D. Perez-Ruiz, S. Martinez-Rodriguez, L.N. Lopez-De La Calle Marcaide, A. Lamikiz-Mentxaka, H. Gonzalez-Barrio, O. Pereira-Neto, A robust process for the precision finishing of pieces originated by metallic printing, DYNA, 95:4 (2020) 436-442.

DOI: 10.6036/9382

[10] A. Calleja-Ochoa, H. Gonzalez-Barrio, L.N. López de Lacalle, S. Martínez, J. Albizuri, A. Lamikiz, A New Approach in the Design of Microstructured Ultralight Components to Achieve Maximum Functional Performance. Materials 14 (2021) 1588.

DOI: 10.3390/ma14071588

[11] S. Kumar Mishra, G. Gómez-Escudero, H. González-Barrio, A. Calleja-Ochoa, S. Martinez, M. Barton, L.N. Lopez de Lacalle, Machining-induced characteristics of microstructure-supported LPBF-IN718 curved thin walls, Procedia CIRP, 108 (2022) 176-181.

DOI: 10.1016/j.procir.2022.03.031