Exploring the impact of configurational entropy on the design and development of CoNi-based superalloys for sustainable applications

A comprehensive literature review on recently rediscovered Co- and/or CoNi-based superalloys, strengthened by the γ' phase, revealed a relationship between configurational entropy of system and solvus temperature. This study was conducted high Cr superalloy with to test our hypothesis based sustainable metallurgy framework. Thermodynamic calculations were performed design chemical compositions, followed vacuum casting heat treatments produce desired alloys. The microstructures characterized using scanning electron microscope, backscattered diffraction, transmission differential thermal analysis. Microhardness nanoindentation tests employed measure mechanical properties. results showed that both type alloying elements determine final high-temperature performance We found enhance higher temperature, should be increased adding stabilizing elements. microstructural characteristics designed alloys before after are discussed in detail. outcome this is beneficial for developing cobalt-based high-entropy superalloys appropriate processing windows freezing ranges advanced manufacturing purposes, such as powder bed fusion technologies.