About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
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Presentation Title |
Theory Guided Combinatorial Design of Metastable High Entropy Alloys |
Author(s) |
Chinmoy Mahata, Sadhasivam M. , Pradeep K. G. |
On-Site Speaker (Planned) |
Chinmoy Mahata |
Abstract Scope |
Theoretically guided, non-equiatomic FeMnCoCr based metastable high entropy alloy (HEA) has been designed and synthesized in bulk using combinatorial rapid alloy prototyping approach. The combinatorially synthesized alloys demonstrated the effectiveness of thermodynamic guidance in successfully designing single-phase face-centered cubic (FCC) alloys or dual-phase combinations of FCC and hexagonal closed packed (HCP) phases. Following suitable thermomechanical processing procedure, these alloys can exhibit significant enhancements in both yield strength and ultimate tensile strength, mainly triggered through cluster-induced strengthening mechanisms while maintaining transformation-induced plasticity (TRIP) effects. Transmission Kikuchi diffraction studies on the undeformed and deformed states elucidated the activation of TRIP mechanism upon deformation, while Atom Probe Tomography (APT) revealed of the presence of nanoscale clusters distributed uniformly in the metastable FCC phase. These nano-scale clusters are considered to be responsible for the observed improvement in both the strength and ductility in metastable family of HEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Other |