About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
Microstructural design of Multi-Principal Element Alloys |
Author(s) |
Shiddhartha Ramprakash, Shalini Roy Koneru, Christopher Tandoc, Yong-Jie Hu, Hamish Fraser, Yunzhi Wang |
On-Site Speaker (Planned) |
Shiddhartha Ramprakash |
Abstract Scope |
High-throughput framework plays an indispensable role in contemporary alloy design by exploring the vast compositional space, leading to desired microstructures with targeted properties. This also necessitates the understanding of phase transformation pathways which are influenced by various materials and processing parameters. For instance, the exceptional mechanical properties observed in AlMo0.5NbTa0.5TiZr and Al0.5NbTa0.8Ti1.5V0.2Zr alloys have been attributed to their inverted superalloy-like BCC+B2 microstructure, characterized by plate-cube dual morphologies. However, detailed mechanism for formation of such morphology is still unclear. This work aims to shed light on future microstructural engineering by illustrating the use of high-throughput CALPHAD calculations to aid the design of novel microstructures in multi-principal element alloys (MPEAs). Furthermore, we use phase-field simulations to demonstrate microstructural evolution pathways leading to plate-cube dual morphology using a prototype Ti-W binary system, in which nonlinear dependances of lattice parameters and elastic constants of BCC solid solution on composition are representative of refractory MPEAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Phase Transformations, Modeling and Simulation |