Influence of Internal Topologies on Components Produced by Selective Laser Melting: Numerical Analysis
Regardless of the manufacturing process used, subtractive or additive, material, purpose and application, produced components are conventionally solid mass with more or less complex shape depending on the production technology selected. Aspects such as reducing the weight of components, associated with the low volume of material required and the almost non-existent material waste, speed and flexibility of production and, primarily, a high mechanical strength combined with high structural performance, are competitive advantages in any industrial sector, from automotive, molds, aviation, aerospace, construction, pharmaceuticals, medicine and more recently in human tissue engineering. Such features, properties and functionalities are attained in metal components produced using the additive technique of Rapid Prototyping from metal powders commonly known as Selective Laser Melting (SLM), with optimized internal topologies and varying densities. In order to produce components with high strength and high structural and functional performance, regardless of the type of application, three different internal topologies were developed and analyzed using numerical computational tools. The developed topologies were numerically submitted to mechanical compression and four point bending testing. Finite Element Analysis results demonstrate how different internal topologies can contribute to improve mechanical properties, even with a high degree of porosity relatively to fully dense components. Results are very promising not only from the point of view of mechanical resistance, but especially through the achievement of considerable variation in density without loss of structural and functional high performance.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1337711Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1980
 J.-P. Kruth; M. Badrossamay; E.Yasa, J. Deckers, L. Thijs, J. Van Humbeeck, “Part and material properties in selective laser melting of metals,”16th International Symposium on Electromachining, ISEM XVI, 2010.
 J.-P. Kruth, G. Levy, F. Klocke, T.H.C. Childs, “Consolidation phenomena in laser and powder-bed based layered manufacturing,” CIRP Annals, vol. 56 (2), 2007, pp. 730-759.
 E. Yasa, J. Deckers, J.-P. Kruth, M. Rombouts and J. Luyten, “Charpy impact testing of metallic selective laser melting parts,” Virtual and Physical Prototyping, 5 (2), 2010, pp. 89-98.
 I. Yadroitsev, L. Thivillon, Ph. Bertrand, I. Smurov, “Strategy of manufacturing components with designed internal structure by selective laser melting of metallic powder,” Applied Surface Science, 254, 2007, pp. 980–983.
 L. Hao, S. Dadbakhsh, O. Seaman, M. Felstead, “Selective laser melting of a stainless steel and hydroxyapatite composite for load-bearing implant development,” Journal of Materials Processing Technology, 209, 2009, pp. 5793–5801.
 M. Khan and P. Dickens, “Selective Laser Melting (SLM) of pure gold, Gold Bulletin, 43 (2), 2010, pp. 114-121.
 B.-. Joo, J.-H. Jang, J.-H. Lee, Y.-M. Son, Y.-H. Moon, “Selective laser melting of Fe-Ni-Cr layer on AISI H13 tool steel,” Trans. Nonferrous Met. Soc. China, 19, 2009, pp. 921−924.
 P. Fox, S. Pogson, C.J. Sutcliffe, E. Jones, “Interface interactions between porous titanium/tantalum coatings, produced by Selective Laser Melting (SLM), on a cobalt–chromium alloy,” Surface & Coatings Technology, 202, 2008, pp. 5001–5007.
 M. Domingos, D. Dinucci, S. Cometa, M. Alderighi, P. J. Bártolo and F. Chiellini, “Polycaprolactone scaffolds fabricated via bioextrusion for tissue engineering applications,” International Journal of Biomaterials, 2009, pp. 1-9.