Selected Problems of Additive Manufacturing Using SLS/SLM Processes

Kozak, Jerzy; Zakrzewski, Tomasz; Witt, Marta; Dębowska-Wąsak, Martyna

doi:10.2478/tar-2021-0003

Abstract

Additive Manufacturing (AM) based on Selective Laser Sintering (SLS) and Selective Laser Melting (SLM) is relatively widely used to manufacture complex shape parts made from metallic alloys, ceramic and polymers. Although the SLM process has many advantages over the conventional machining, main disadvantages are the relatively poor surface quality and the occurrence of the material structure defect porosity.

The paper presents key problems directly related to the implementation of AM, and in particular the selection and optimization of process conditions. The first section examines the issues of dimensional accuracy, the second surface quality and porosity problem determining the mechanical properties of manufactured products.

References

[1] Gibson, L., Rosen, D. and Stucker, B., 2009, Additive manufacturing technologies: rapid prototyping to direct digital manufacturing, Springer New York Heidelberg Dordrecht London.10.1007/978-1-4419-1120-9_14
Search in Google Scholar Back to article
[2] EPMA, 2019, Introduction to Additive Manufacturing Technology, third edition, European Powder Metallurgy Association. https://www.epma.com/epma-free-publications/product/introduction-to-additive-manufacturing-brochure.
Search in Google Scholar Back to article
[3] Meier, Ch., Penny, R., Zou, Y., Gibbs J. S. and Hart, A. J., 2014, “Thermophysical Phenomena in Metal Additive Manufacturing by Selective Laser Melting: Fundamentals, Modeling, Simulation and Experimentation”, Annual Review of Heat Transfer, 20, pp. 241-316. 10.1615/AnnualRevHeatTransfer.2018019042.10.1615/AnnualRevHeatTransfer.2018019042
Search in Google Scholar Back to article
[4] Yadroitsau, I., 2008, “Fabrication directe d’objets 3D par fusion sélective laser à partir des poudres métalliques”. PhD thesis, université Jean-Monnet.
Search in Google Scholar Back to article
[5] Kozak, J., 2018, Mathematical Modelling of Advanced Manufacturing Processes. Institute of Aviation Scientific Publications Division, ISBN: 978-83-63539-49-8, Warsaw, Poland.
Search in Google Scholar Back to article
[6] https://www.google.pl/search?q=ge+3d+printed+jet+engine&client=opera&biw=1240&bih=610&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahuKEwiAycD_1snbAhXmd-poKHdPgCFMQsAQIlQE.
Search in Google Scholar Back to article
[7] Kozak, J. and zakrzewski T., 2018, “Accuracy problems of additive manufacturing using SLS/SLM processes”, AIP Conference Proceedings.10.1063/1.5056273
Search in Google Scholar Back to article
[8] Carslow, H. S. and Jaeger, J. C., 1959, Conduction of Heat in Solids, Oxford university Press, Oxford, uK.
Search in Google Scholar Back to article
[9] Alexiades, v. and Solomon, A. D., 1993, Mathematical Modeling of Melting and Freezing Processes, Washington: Hemisphere Publishing Corporation.10.1115/1.2930032
Search in Google Scholar Back to article
[10] Cohen, M.I. and Epperson, J.P., 1968, “Application of Lasers to Microelectronic Fabrication”, Advances in Electronics and Electron Physics, pp. 139-186.
Search in Google Scholar Back to article
[11] Bossak, M., and Kozak, J., 2003, “Selected problems of Designing and Manufacturing MEMS-Accelerometers”. Proceed. Of Symposium on Novel Vehicle Concepts and Emerging Vehicle Technologies, Brussels.
Search in Google Scholar Back to article
[12] Egger, G., Gygax, P.-E., Glardon, R. and Karapatis, N. P., 1999, “Optimization of powder layer density in selective laser sintering”. 10th Solid Freeform Fabrication Proceedings, pp. 255-263.
Search in Google Scholar Back to article
[13] Ahmed H. Maamoun, Yi F. Xue, Mohamed A. Elbestawi, Stephen C. veldhuis, 2018, “Effect of Selective Laser Melting Process Parameters on the Quality of Al Alloy Parts: Powder Characterization, Density, Surface Roughness, and Dimensional Accuracy”, Materials, 11(12), p. 2343. 10.3390/ma11122343.10.3390/ma11122343631685130469468
Search in Google Scholar Back to article
[14] Gibbings, J.C., 2011, Dimensional Analysis, Springer, London.10.1007/978-1-84996-317-6
Search in Google Scholar Back to article
[15] Chunlei Qiu, Chinnapat Panwisawas, Mark Ward, Hector C. Basoalto, Jeffery W. Brooks, Moataz M. Attallah, 2015, “On the role of melt flow into the surface structure and porosity development during selective laser melting”, Acta Materialia, 96, pp. 72-79.10.1016/j.actamat.2015.06.004
Search in Google Scholar Back to article
[16] Sola, A. and Nouri, A., 2019, “Microstructural porosity in additive manufacturing: The formation and detection of pores in metal parts fabricated by powder bed fusion”, Journal of Advanced Manufacturing and Processing, 1(3). 10.1002/amp2.10021.10.1002/amp2.10021
Search in Google Scholar Back to article

Selected Problems of Additive Manufacturing Using SLS/SLM Processes

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