| Abstract Scope |
High Entropy Alloys (HEAs) hold great promise for developing mechanically robust and magnetically soft microstructures characterized by multiple interfaces. However, traditional processing methods such as casting are often labor-intensive and time-consuming. Advanced manufacturing techniques like directed energy deposition (DED) provide a more efficient alternative, enabling the formation of unique microstructures. In this study, an equiatomic AlCoCuFeNi alloy, strengthened through precipitation, was fabricated using laser-engineered net shaping (LENS), a DED technique. Prior optimization of the printing parameters ensured the production of parts with minimal internal defects, as confirmed by high-resolution computed tomography (CT) analysis. It exhibits a heterogeneous dual-phase microstructure, comprising BCC and Cu-rich FCC phases with multiple interfaces. The effects of heat treatment were explored using differential scanning calorimetry (DSC) and CALPHAD, with a focus on microstructural evolution, magnetic properties, and mechanical performance. The findings highlight a refined microstructure with nanoscale precipitates, enhanced mechanical strength, and improved soft magnetic characteristics. |