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Understanding Friction and Wear Behavior at the Nanoscale of Aluminum Matrix Composites Produced by Laser Powder Bed Fusion
Author(s) -
Lorusso Massimo,
Aversa Alberta,
Marchese Giulio,
Calignano Flaviana,
Manfredi Diego,
Pavese Matteo
Publication year - 2020
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201900815
Subject(s) - materials science , ceramic , composite material , microstructure , nanocomposite , alloy , tribology , nanoscopic scale , aluminium , fabrication , reinforcement , nanotechnology , medicine , alternative medicine , pathology
Laser powder bed fusion (LPBF) is an additive manufacturing (AM) technique for the fabrication of components with a complex design, and it is particularly appropriate for structural applications in automotive and air‐space industries. Aluminum matrix composites (AMCs) are promising materials for these uses because they are ductile, light weight, and have an excellent strength‐to‐weight ratio. Herein, a study on microstructure, hardness, and the nanoscale tribological properties of the AlSi10Mg alloy with and without ceramic particles is presented. AMCs are realized with different compositions: 10 wt% of microsize TiB 2 , 1 wt% of nanosize TiB 2 , 0.5 wt% of nanosize SiO 2 , and 0.5 wt% of nanosize MgAl 2 O 4 . It is found that the nanocomposites show a lower coefficient of friction (COF), whereas in the case of microsize TiB 2 reinforcement, the COF is higher than with either nanosize reinforcements or AlSi10Mg alloy without reinforcement. Results indicate that the interfacial bond between the matrix and the particles of the ceramic reinforcement has a crucial role in wear processes.