Publisher : The Korean Society for Technology of Plasticity
DOI : 10.5228/KSTP.2016.25.3.195
Title & Authors
Effect of Powder Morphology on the Deposition Quality for Direct Laser Melting Lee, S.H.; Kil, T.D.; Han, S.W.; Moon, Y.H.;
Direct laser melting(DLM) is an additive manufacturing process that can produce parts by solidification of molten metallic powder layer by layer. The properties of the fabricated parts strongly depend on characteristics of the metallic powder. Atomized powders having spherical morphology have commonly been used for DLM. Mechanical ball-milling is a powder processing technique that can provide non-spherical solid powders without melting. The aim of the current study was to investigate the effect of powder morphologies on the deposition quality in DLM. To characterize the morphological effect, the performances of spherical and non-spherical powders were compared using both single- and multi-track DLM experiments. DLM experiments were performed with various laser process parameters such as laser power and scan rate, and the deposition quality was evaluated. The surface roughness, cross-section bead shape and process defects such as balling or non-filled area were compared and discussed in this study.
Direct Laser Melting;Mechanical Ball Milling;Atomizing;Powder Morphology;Fiber Laser;
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