Proceedings of the
9th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2022)
15 – 18 November 2022, Singapore
doi:10.3850/978-981-18-6021-8_OR-01-0315

A Novel 2µm Fiber Laser Setup for Evaluating the Sintering Ability of Polymeric Powder for Selective Laser Sintering

Eugene Kok1, Baicen Li2 and Feng Lin Ng1,a

1Singapore Institute of Manufacturing Technology (SIMTech), 2 Fusionopolis Way, Singapore 138634, Singapore

2Department of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore

ABSTRACT

Selective Laser Sintering (SLS) is a powder bed fusion additive manufacturing process involving the use of polymeric powders. Typical SLS systems utilizes either CO2 laser, at 10.6┬Ám or traditional diode fiber lasers (Nd-YAG, Yb), at 0.8-1.07 µm. In this work, a 2µm Tm fiber laser was setup to evaluate the sintering ability of polyamide-12 (PA2200) powder and compared with commercial SLS system in terms of mechanical performance, thickness of sintered layer and surface roughness. In-house lasered samples using 2µm laser showed higher strength (+37%) and larger thickness (+210%) as compared to EOS P395 printed sample with similar print properties. The higher thickness layer set the basis for a possible high speed SLS printing process.

Keywords: Selective Laser Sintering, SLS, Polymer Powder.



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