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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Advances in Multi-Principal Element Alloys V: Mechanical Behavior
Presentation Title Phase Fraction and Coherency of the B2 Phase on Ductility in Al-containing HEAs
Author(s) Emily F. Holcombe, Ben W.Y. Redemann, Loic Perriere, JP Couzinie, Howie Joress, Mitra Taheri
On-Site Speaker (Planned) Emily F. Holcombe
Abstract Scope Lightweight alloys are a natural landscape for recycling and reuse, but wide compositional variations in scrap may lead to purity and alloy chemistry challenges. High entropy alloys provide a landscape on which to develop lightweight compositions that match traditional alloys in properties but with greater ability to tolerate variations in composition. Here we present progress toward the development and scaling of high aluminum content high entropy alloys. The alloys studied were selected based on initial results from a combinatorial magnetron sputtered thin film. The compositions with the best passivation performance from the thin film work, Al0.25Co0.15Cr0.30Fe0.15Ni0.15 and Al0.28Co0.15Cr0.27Fe0.15Ni0.15, were found to be near eutectic and hypoeutectic compositions and exhibit spinodal decomposition. Hardness results showed that the near eutectic had a higher hardness and a lower susceptibility to cracking. This work provides insight into the phase stability and the impact on mechanical properties to support future lightweight development.
Proceedings Inclusion? Planned:
Keywords Aluminum, High-Entropy Alloys, Phase Transformations

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