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Influence of process parameters on surface roughness of aluminum parts produced by DMLS

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Abstract

Direct metal laser sintering (DMLS) is an additive manufacturing technique for the fabrication of near net-shaped parts directly from computer-aided design data by melting together different layers with the help of a laser source. This paper presents an investigation of the surface roughness of aluminum samples produced by DMLS. A model based on an L18 orthogonal array of Taguchi design was created to perform experimental planning. Some input parameters, namely laser power, scan speed, and hatching distance were selected for the investigation. The upper surfaces of the samples were analyzed before and after shot peening. The morphology was analyzed by means of field emission scanning electron microscope. Scan speed was found to have the greatest influence on the surface roughness. Further, shot peening can effectively reduce the surface roughness.

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Authors and Affiliations

  1. Center for Space Human Robotics IIT@Polito, Istituto Italiano di Tecnologia, Corso Trento, 21, 10129, Turin, Italy

    F. Calignano, D. Manfredi, E. P. Ambrosio & P. Fino

  2. DIGEP—Dipartimento di Ingegneria Gestionale e della Produzione, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy

    L. Iuliano

  3. DISAT—Dipartimento Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy

    P. Fino

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  1. F. Calignano
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  2. D. Manfredi
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  3. E. P. Ambrosio
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  4. L. Iuliano
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  5. P. Fino
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Correspondence to F. Calignano.

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Calignano, F., Manfredi, D., Ambrosio, E.P. et al. Influence of process parameters on surface roughness of aluminum parts produced by DMLS. Int J Adv Manuf Technol 67, 2743–2751 (2013). https://doi.org/10.1007/s00170-012-4688-9

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  • DOI: https://doi.org/10.1007/s00170-012-4688-9

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