|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Recent Investigations and Developments of Titanium-containing High Entropy Alloys
||In-Situ Laser-Deposited Ti-Based High Entropy Alloys for Aerospace Applications
||Modupeola Dada, Patricia Popoola, Samson Adeosun, Ntombi Mathe, Sisa Pityana, Thembisile Dlamini, Raji Sadiq
|On-Site Speaker (Planned)
Contrary to the conventional method of mixing pre-alloyed powders via a ball mill prone to segregation and contamination, this study investigates the capability of designing the next generation of compositionally graded materials for aerospace components. AlCoCrFeNiTiVx High Entropy Alloys were successfully fabricated by satelliting the base AlCoCrFeNiTi alloy powder and the smaller Vanadium powder using a double powder feedstock via in-situ reactive alloying. Regulating the feed rate gave different atomic ratios of Vanadium. The microstructural and nanomechanical properties were investigated using XRD, SEM and a nanoindentation tester, respectively. The experimental results showed satelliting the parent AlCoCrFeNiTi alloy with Vanadium had a homogeneous distribution with dendritic structures. The nanomechanical properties of the alloys increased with a decrease in the powder feed rate. This study defines the capabilities of in-situ fabrication of high entropy alloys and presents novel techniques for preparing equiatomic or near-equiatomic high entropy alloys using laser additive manufacturing.
||Planned: None Selected