| Abstract Scope |
High entropy alloys (HEAs) offer exceptional mechanical properties, corrosion resistance, and thermal stability, yet their inherent brittleness, often due to their BCC crystal structure, limits their applications. This study focuses on leveraging spinodal decomposition as a phase formation mechanism to enhance ductility by introducing a more ductile phase within the microstructure. Promising HEA compositions are predicted using analytical models and CALPHAD, followed by synthesis via arc melting. Microstructure characterization and mechanical testing are performed to evaluate the alloys. Nonequimolar Al-V-Cr-Fe alloy exhibits a desirable equiaxed grain structure with triple junctions, ideal for as-cast materials. Despite its homogeneity and single-phase nature, the sample demonstrates significant brittleness. Comprehensive analysis using XRD, SEM/EDX, TEM, and microhardness testing is conducted, along with heat treatment studies to optimize spinodal decomposition. This approach provides insights into tailoring HEA microstructures for improved mechanical performance, particularly ductility. |