|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Impact of Thermal Processing on Microstructures and Mechanical Properties of Quaternary High Entropy Alloys
||Jakhongir Bakirov, Orifjon Mikhliev, Sarvar Rozikhodjaev, Elyorjon Jumaev
|On-Site Speaker (Planned)
This study investigates the crystal structure and mechanical behavior of a quaternary AlCoCrNi-based high-entropy alloy. The alloy was prepared through vacuum arc casting and subsequently annealed at 873 K for 24, 72, and 192 hours. Body-centered cubic (BCC) crystal structure has been revealed in the as-cast sample by the XRD analysis, whereas heat-treated samples exhibited hexagonal close-packed (HCP) patterns. The microstructure of the alloys displayed dendritic and matrix regions. The dendritic area in the as-cast sample exhibited spherical particles, while the matrix area showed a basket-weave morphology. Upon annealing for various durations, grain growth occurred in the matrix area, and phase transformation took place in the dendritic area. This alloy demonstrated excellent compressive properties. Annealing resulted in the strengthening of the yield strength, however sacrificing the elasticity of the alloy.
||Planned: Metallurgical and Materials Transactions