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Materials 2018, 11(5), 742; https://doi.org/10.3390/ma11050742

Influence of Powder Characteristics on Processability of AlSi12 Alloy Fabricated by Selective Laser Melting

1
“Micropowders Technologies” Laboratory, Research and Education Center “Aerospace Technologies”, South Ural State University (SUSU), Lenin Avenue 76, 454080 Chelyabinsk, Russia
2
Research and Education Center “Nanotechnology”, South Ural State University (SUSU), Lenin Avenue 76, 454080 Chelyabinsk, Russia
3
Faculty of Material Science and Metallurgical Technologies, Polytechnic Institute, South Ural State University (SUSU), Lenin Avenue 76, 454080 Chelyabinsk, Russia
4
Department of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, Teknologivegen 22, 2815 Gjøvik, Norway
5
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria
6
Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate Tee 5, 19086 Tallinn, Estonia
*
Author to whom correspondence should be addressed.
Received: 13 April 2018 / Revised: 4 May 2018 / Accepted: 5 May 2018 / Published: 7 May 2018
(This article belongs to the Special Issue Perspectives on Additively Manufactured Metallic Materials)
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Abstract

Selective laser melting (SLM) is one of the additive manufacturing technologies that allows for the production of parts with complex shapes from either powder feedstock or from wires. Aluminum alloys have a great potential for use in SLM especially in automotive and aerospace fields. This paper studies the influence of starting powder characteristics on the processability of SLM fabricated AlSi12 alloy. Three different batches of gas atomized powders from different manufacturers were processed by SLM. The powders differ in particle size and its distribution, morphology and chemical composition. Cubic specimens (10 mm × 10 mm × 10 mm) were fabricated by SLM from the three different powder batches using optimized process parameters. The fabrication conditions were kept similar for the three powder batches. The influence of powder characteristics on porosity and microstructure of the obtained specimens were studied in detail. The SLM samples produced from the three different powder batches do not show any significant variations in their structural aspects. However, the microstructural aspects differ and the amount of porosity in these three specimens vary significantly. It shows that both the flowability of the powder and the apparent density have an influential role on the processability of AlSi12 SLM samples. View Full-Text
Keywords: additive manufacturing; selective laser melting (SLM), AlSi12 alloy; powder; porosity additive manufacturing; selective laser melting (SLM), AlSi12 alloy; powder; porosity
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Baitimerov, R.; Lykov, P.; Zherebtsov, D.; Radionova, L.; Shultc, A.; Prashanth, K.G. Influence of Powder Characteristics on Processability of AlSi12 Alloy Fabricated by Selective Laser Melting. Materials 2018, 11, 742.

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