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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Accelerated Discovery and Insertion of Next Generation Structural Materials
Presentation Title Computational Design of an Ultra-strong High-entropy Alloy
Author(s) Mauricio Ponga
On-Site Speaker (Planned) Mauricio Ponga
Abstract Scope We present a combined experimental and computational investigation of the mechanical properties of a CoCrFe0.75NiMo0.3Nb0.125 high-entropy alloy additively manufactured via cold spray. Under compression, the sprayed alloy exhibits extraordinary mechanical properties, reaching yield stress of ~1745 MPa, ultimate stress of ~2622 MPa, and a maximum strain at failure of ~9%. These exceptional mechanical properties are the result of four independent hardening mechanisms. Using a novel design condition, an optimal solid solution and precipitation-strengthening alloy are obtained from ab-initio simulations. We show how the microstructure can be tailored to develop optimal mechanical strength using additive manufacturing. These subtle atomic and microstructural features result in outstanding experimentally evaluated yield and ultimate stresses compared to other high-entropy alloys with similar compositions.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Mechanical Properties,


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