| Abstract Scope |
Nanostructured multilayers are emerging materials with excellent mechanical, tribological, and corrosion properties, enabled by the presence of ultrafine layers and a high density of interfaces. In the present work, the wear, corrosion and tribocorrosion resistance of nanostructured multilayers of Al/X (X= Mg, Cu, and Ti) were studied via experiments, finite element simulations, and density functional theory calculations. Outstanding wear and corrosion resistance of the multilayers were observed, where the overall degradation was governed by the synergistic effects of the mechanical and corrosion properties of the constituting materials. Both layer thickness and orientation of the multilayers were found to affect the subsurface residual stress distribution and localized surface corrosion kinetics via finite element modeling. Finally, density functional calculations of their surfaces provide further insight on the material selection and design criteria for multilayers toward enhanced performance under extreme environment. |