Microstructure and properties of graphene/AlCoCrFeTiCux coatings fabricated by laser additive manufacturing
摘要
To improve the surface performance of 6061 Aluminum alloy, Graphene (Gr)/high entropy alloys (HEAs) coatings were prepared on its surface using laser additive manufacturing technology. The experimental results show that the Gr/AlCoCrFeTiCux coatings are mainly composed of equiaxed crystals, with Gr playing a strengthening role and Cu element playing a fine grain strengthening role. The coating has excellent mechanical properties and corrosion resistance. The microhardness is between 439 and 453 HV and average friction coefficient is between 0.43 and 0.50, while the self-corrosion potential is between −1.13 and 0.94 V and the self-corrosion current densitya is between 3.78 · 10−4 and 7.59 · 10−5 A/cm2. Our investigation shows that laser additive manufacturing Gr/AlCoCrFeTiCux coatings on 6061 Aluminum surfaces can effectively improve their surface properties.