| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Simulations/Experiments Integration for Next Generation Hypersonic Materials
|
| Presentation Title |
Design and Rapid Solidification Analysis of Refractory Multi-principal Element Alloys |
| Author(s) |
Tatu Pinomaa, Joni Kaipanen, Lassi Linnala, Mikko Tahkola, Jukka Aho, Abhishek Biswas, Napat Vajragupta, Sicong Ren, Matti Lindroos, Kate Elder, Thomas Voisin, Aurelien Perron, Scott McCall, Joseph T. McKeown, Nikolas Provatas, Anssi Laukkanen |
| On-Site Speaker (Planned) |
Tatu Pinomaa |
| Abstract Scope |
Additive manufacturing of refractory multi-principal element alloys (RMPEA) faces challenges such as microcracking. To address this, we identify promising RMPEAs via machine-learning-accelerated computational thermodynamics screening, enriched with density functional theory based metrics of properties such as ductility.
We perform a multiscale modeling analysis to explore the rapid solidification features of refractories using gaussian approximation potential molecular dynamics to extract solid-liquid interface energy and solute trapping behavior. Together with phase field crystal method, we analyze the resulting solidification defects, encompassing point defects, dislocations, and orientation gradients.
On continuum scale, we couple phase field and crystal plasticity models to examine microstructural residual stresses and microcracking during processing, and perform property predictions. We discuss the role of ductile-to-brittle transition, and the alloy sensitivity to strain rate and elevated temperatures. Results are compared to experiments, and related to coupling across the presented models operating on different length and time scales. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, ICME, High-Entropy Alloys |