Abstract：Aluminum alloys, which have the advantages of low density, high specific strength, and good corrosion
resistance, are widely used in aviation, shipbuilding, automobiles, and other fields. Selective laser melting forming
(SLM) is a promising technology that can fabricate complex parts at one time. In this study, the friction and wear
properties of Al-Cu-Mg alloy fabricated by selective laser melting (SLM) were studied and compared with those of
a cast ZL205A alloy with a similar composition. The results show that the SLM process can refine the alloy grains,
change the size and distribution of Al2Cu, and make the grains smaller and more uniform. Compared with the cast
ZL205A alloy, the wear rate and friction coefficient of the SLM-fabricated Al-Cu-Mg alloy decreased in varying degrees.
SLM-fabricated Al-Cu-Mg alloy has the best wear resistance in cross section, followed by longitudinal section,
and cast ZL205A has the worst wear resistance. The wear mechanisms of SLM-fabricated Al-Cu-Mg alloy are
different under varying loads: the wear mechanisms at low load are mainly abrasive, and a little adhesive and plastic
extrusion wear; the wear mechanisms under medium load are abrasive, adhesive and oxidation wear; the wear
mechanisms under high load are mainly a combination of delamination, adhesive and oxidation wear.
2023, Vol. 33 
