Aluminium-Based Dissimilar Alloys Surface Composites Reinforced with Functional Microparticles Produced by Upward Friction Stir Processing

Surface metal matrix composites offer an excellent solution for applications where surface properties play a crucial role in components’ performance and durability, such as greater corrosion resistance, better wear high formability. Solid-state processing techniques, friction surfacing stir welding/processing, several advantages over conventional liquid-phase methods. This research investigated the feasibility of producing aluminium-based dissimilar alloys reinforced with functional microparticles through experimental validation, determined process parameters that resulted more homogeneous distribution particles composites, enhanced understanding Upward Friction Stir Processing (UFSP) technology. The production (AA 7075-T651 AA 6082-T651) SiC was studied, it concluded macrography micrography analyses, scanning electron microscopy (SEM) analysis, microhardness measurements, eddy currents technique reveal extensive incorporation particles. In stirred zone, decrease approximately 20 HV 0.5 hardness observed compared to base material. reduction is attributed weakening effect caused by low-temperature annealing during UFSP, which reduces strengthening T651 heat treatment. Additionally, presence did not affect composite zone. Furthermore, despite significant internal defects, SEM analyses revealed evidence lower alloy merging upper indicating plate had beyond being merely sacrificial. Therefore, bimetallic UFSP may produced from monometallic matrix. results testing measurements support this finding are consistent SEM/EDS analyses.