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Journal of Materials Engineering and Performance

, Volume 25, Issue 8, pp 3152–3160 | Cite as

Tribological Behavior of Aluminum Alloy AlSi10Mg-TiB2 Composites Produced by Direct Metal Laser Sintering (DMLS)

  • Massimo LorussoEmail author
  • Alberta Aversa
  • Diego Manfredi
  • Flaviana Calignano
  • Elisa Paola Ambrosio
  • Daniele Ugues
  • Matteo Pavese
Article

Abstract

Direct metal laser sintering (DMLS) is an additive manufacturing technique for the production of parts with complex geometry and it is especially appropriate for structural applications in aircraft and automotive industries. Aluminum-based metal matrix composites (MMCs) are promising materials for these applications because they are lightweight, ductile, and have a good strength-to-weight ratio This paper presents an investigation of microstructure, hardness, and tribological properties of AlSi10Mg alloy and AlSi10Mg alloy/TiB2 composites prepared by DMLS. MMCs were realized with two different compositions: 10% wt. of microsize TiB2, 1% wt. of nanosize TiB2. Wear tests were performed using a pin-on-disk apparatus on the prepared samples. Performances of AlSi10Mg samples manufactured by DMLS were also compared with the results obtained on AlSi10Mg alloy samples made by casting. It was found that the composites displayed a lower coefficient of friction (COF), but in the case of microsize TiB2 reinforcement the wear rate was higher than with nanosize reinforcements and aluminum alloy without reinforcement. AlSi10Mg obtained by DMLS showed a higher COF than AlSi10Mg obtained by casting, but the wear rate was higher in the latter case.

Keywords

additive manufacturing (AM) direct metal laser sintering (DMLS) metal matrix composites (MMCs) nanoindentation tribology 

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Copyright information

© ASM International 2016

Authors and Affiliations

  • Massimo Lorusso
    • 1
    Email author
  • Alberta Aversa
    • 2
  • Diego Manfredi
    • 1
  • Flaviana Calignano
    • 1
  • Elisa Paola Ambrosio
    • 1
  • Daniele Ugues
    • 2
  • Matteo Pavese
    • 2
  1. 1.Center for Space Human Robotics @ PolitoIstituto Italiano di TecnologiaTurinItaly
  2. 2.Department of Applied Science and TechnologiesPolitecnico of TorinoTurinItaly

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