|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Effect of Al and Ti Addition on the Strain Hardening Behavior of Non-equiatomic CoCrFeNi High Entropy Alloy
||Bushra Harun, E-Wen Huang, An-Chou Yeh, Suresh Neelakantan, Jayant Jain
|On-Site Speaker (Planned)
Near-equiatomic multicomponent systems have proven effective in achieving remarkable mechanical properties. This inspired researchers to comprehend the reason for their exceptional behavior and to analyze processes that would further enhance their properties. Precipitation strengthening is one such viable process. This study examined four precipitation hardenable high entropy alloy systems, AlxCo1.5CrFeNi1.5Tiy, where x = 0, 0.2, 0.3, 0.5, and x + y = 0.5 in molar ratios. Their strain hardening behavior, considering tensile testing, was analyzed in solutionized and peak-aged conditions using TEM, highlighting the microstructural influence of Al and Ti additions and precipitates formed in these systems. The results indicate increased Ti content and precipitation of different phases (B2 and L12) lead to enhanced strain hardening. However, Al addition provides improved ductility. The formation of complex dislocation substructures like Taylor lattices and stacking faults is observed in these systems.
||Planned: Metallurgical and Materials Transactions