| Abstract Scope |
Al 7075 is widely used in aerospace applications but is vulnerable to environmental degradation. This study explores the impact of silver (Ag) additions (1–4% by weight) on its nanoindentation properties. Unlike conventional reinforcements, Ag enhances hardness and environmental resistance while refining the alloy's microstructure. Nanoindentation tests using a Berkovich indenter reveal that 1%, 2%, and 4% Ag additions improve hardness and elastic modulus, with 4% yielding the highest values. Conversely, 3% Ag shows reduced performance due to dislocation behaviors (SSDs and GNDs). Deformation analysis via scanning probe microscopy and X-ray diffraction indicates minimal deformation at 4% Ag and maximum at 1%. Numerical simulations confirm experimental findings. Overall, Ag addition significantly enhances the mechanical properties of Al 7075, making it more suitable for aerospace and high-stress environments. |