This research presents the development and characterization of an innovative CoNi-based high entropy superalloy optimized for Laser Powder Bed Fusion (L-PBF) technology. Leveraging principles of high entropy alloys (HEAs), the alloy composition comprising Co, Ni, Cr, Al, V, Ti, Ta, and W is tailored to meet the rigorous demands of sustainable applications. Through a systematic investigation of process parameters, a process window is established to achieve parts with superior mechanical properties, including tensile strength exceeding 1 GPa and ductility exceeding 30% at room temperature in as-built condition. Additionally, compression tests reveal remarkable yield strength retention up to 700°C. Microstructural analysis (based on EBSD and TEM) confirms the formation of a single-phase fcc solid solution without any topologically close-packed (TCP) phases and remarkable segregation, highlighting the alloy's crack-resistant nature and high density achievable via L-PBF. The alloy's design principles, supported by calculation of phase diagram (CALPHAD) using HEA database, underline its potential for high-performance component production in critical industries.
