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 |
Combinatorial Discovery of Refractory High-Entropy Alloys in Composition and Temperature Dimensions: Mechanical Properties and Effect of Elements |
Author(s) |
Changjun Cheng |
On-Site Speaker (Planned) |
Changjun Cheng |
Abstract Scope |
The investigation of high-entropy alloys (HEAs) started from equiatomic systems, i.e., identical composition for all the components. Further research discovered that the change in composition leads to significant changes in structures and properties, which is defined as the cocktail effect in HEAs. Then, the strategy based on combinatorial methodologies provided a solution for accelerated and high-throughput fabrication and characterization of the complex composition space in HEAs. using D magnetron co-sputtering and high-throughput annealing methods, we fabricated TiZr/TiZrHf-Nb/Ta/NbTa HEA libraries with linear composition gradients, which were then annealed up to 400 °C. Synchrotron X-ray mapping demonstrated their structure transformations as functions of compositions and annealing temperatures. Moreover, nanoindentation mapping determined their different distributions of elastic modulus and hardness. The individual and synergistic effects of component elements are evaluated, and the composition-structure-properties relationship provides a guideline for investigating multiple-component systems. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Phase Transformations, Mechanical Properties |