Influence of selected parameters of Selective Laser Sintering process on properties of sintered materials

• Autorzy: Stwora A. , Skrabalak G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Presented researches aimed at determining the influence of parameters of Selective Laser Sintering (SLS), such as: laser power, point distance, scanning speed and exposure time on the density and compression strength of sintered material. Design/methodology/approach: Researches were performed using EOS 250XT (with maximum laser power of 250 W) and Renishaw AM 250 (with maximum laser power of 400W) systems for additive manufacturing. Investigated material was EOS - DirectSteel H20. There was prepared plan of the experiment incorporating above mentioned parameters of the sintering process. According to the DOE, samples for 25 sets of parameters were built, and later on investigated in order to measure and observe their densities and compression strength. Findings: Results of the performed studies enabled to work out the basis of the methodology for finding and optimizing parameters of the SLS process depending on the optimization criteria (i.e. physic-mechanical properties of the sample, sintering time, quality of the sintered surface). Basing on the knowledge gained during performed investigations, it can be stated that the sintering technologies supplied by the manufacturers of additive manufacturing systems can be significantly improved by modifying selected parameters. Practical implications: As the additive manufacturing allows to produce almost any shape, without limits existing in case of subtractive machining methods, it might be applied in the tooling industry for manufacturing moulds for injection moulding. Results of performed studies will find its application in making moulds with conformal cooling channels of durability comparable with solid / base materials. Originality/value: Selective Laser Sintering and Selective Laser Melting processes the additive manufacturing methods, are booming with its possible application fields, however it is still limited due to the main limitations of the process concerning durability and strength of sintered elements. The paper presents approach and test methodology enabling relatively simple and low cost (due to not large number of samples) optimization of SLS process enabling reaching properties of sintered elements comparable with those built of solid materials.

Słowa kluczowe

EN

additive manufacturing; process optimization; selective laser sintering; melting

PL

produkcja dodatkowa; optymalizacja procesów; spiekanie laserowe selektywne; topnienie

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2013
• Tom: Vol. 61, nr 2
• Strony: 375--380
• Opis fizyczny: Bibliogr. 6 poz., rys., tab.

Twórcy

autor

Stwora A.

• Institute of Advanced Manufacturing Technology, ul. Wrocławska 37a, 30-011 Kraków, Poland

autor

Skrabalak G.

• Institute of Advanced Manufacturing Technology, ul. Wrocławska 37a, 30-011 Kraków, Poland

Bibliografia

• [1] D.L. Bourell, J.J. Beaman, The history of laser additive manufacturing, Laser Institute of America, 2012.
• [2] A. Stwora, G. Skrabalak Properties of components produced from a range of metal powders by means of selective laser sintering process, Mechanic 10 (2013) 864 (in Polish).
• [3] J.P. Kruth, M. Badrossamay, E.Yasa, J. Deckers, L. Thijs, J. Van Humbeeck, Part and material properties in selective laser melting of metals, Proceedings of the 16th Conference ISEM, Shanghai, 2010.
• [4] J.P. Kruth, P. Mercelis, J. Van Vaerenbergh; Binding mechanisms in selective laser sintering and selective laser melting, Rapid Prototyping Journal 11/1 (2005) 26-36.
• [5] M. Król, L.A. Dobrzański, Ł. Reimann, I. Czaja, Surface quality in selective laser melting of metal powders, Archives of Materials Science and Engineering 60/2 (2013) 87-92.
• [6] J.P. Kruth, Selective laser melting of iron-based powder Journal of Materials Processing Technology 10 (2004) 616-622.