About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond III
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Presentation Title |
An Experimentally Driven High-throughput Approach to Design Refractory High-entropy Alloys |
Author(s) |
Chanho Lee, Dongyue Xie, Benjamin Kyle Derby, Jon Kevin Baldwin, Christopher Tandoc, Osman Ei Atwani, Yong-Jie Hu, Nan Li, Saryu Fensin |
On-Site Speaker (Planned) |
Chanho Lee |
Abstract Scope |
High-entropy alloy (HEA) design strategies have been limited to theoretical/computational approaches due to their compositional complexity and extremely large compositional parameter space. In this work, we developed an experimentally driven, high-throughput, HEA design approach using a physical vapor deposition (PVD) technique and coupled it with nanomechanical testing to accelerate material design for structural applications. The PVD technique enabled the formation of a compositional gradient across a thin-film sample. Specifically, a 10 cm wafer was used to manufacture a continuous set of 80 HEA compositions within the Nb-Ti-V-Zr family using a single deposition cycle. By applying the solid-solution strengthening theory and developed machine-learning approaches, the strength and ductility of these HEA compositions were quantitatively determined/predicted and then experimentally verified by nano-indentation hardness test. Consequently, 7 refractory HEA compositions were successfully down-selected based on optimized strength and ductility predictions. |