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

  • F. CalignanoEmail author
  • D. Manfredi
  • E. P. Ambrosio
  • L. Iuliano
  • P. Fino
ORIGINAL ARTICLE

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.

Keywords

Aluminum AlSi10Mg Direct metal laser sintering (DMLS) Taguchi method Surface roughness 

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Copyright information

© Springer-Verlag London 2012

Authors and Affiliations

  • F. Calignano
    • 1
    Email author
  • D. Manfredi
    • 1
  • E. P. Ambrosio
    • 1
  • L. Iuliano
    • 2
  • P. Fino
    • 1
    • 3
  1. 1.Center for Space Human Robotics IIT@PolitoIstituto Italiano di TecnologiaTurinItaly
  2. 2.DIGEP—Dipartimento di Ingegneria Gestionale e della ProduzionePolitecnico di TorinoTurinItaly
  3. 3.DISAT—Dipartimento Scienza Applicata e TecnologiaPolitecnico di TorinoTurinItaly

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