About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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AI/Data Informatics: Applications and Uncertainty Quantification at Atomistics and Mesoscales
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Presentation Title |
Exploring Metastability and Mapping Metastable Phase Diagrams Using Machine Learning |
Author(s) |
Srilok Srinivasan, Rohit Batra, Duan Luo, Troy Loeffler, Sukriti Manna, Henry Chan, Liuxiang Yang, Wenge Yang, Jianguo Wen, Pierre Darancet, Subramanian Sankaranarayanan |
On-Site Speaker (Planned) |
Srilok Srinivasan |
Abstract Scope |
We introduce an automated workflow that integrates first-principles physics and atomistic simulations with machine learning (ML), and high-performance computing to allow for exploration of the metastable phases of a given elemental composition and construct "metastable" phase diagrams for materials. We demonstrate our workflow on a pure carbon system which exhibits a vast number of metastable phases without parent in equilibrium. Moreover, we build a neural network model which learns to predict the equation of state of the metastable phases given only the structural information. We identify domains of relative stability and synthesizability of metastable materials using our metastable phase diagram. The predictions of our workflow are confirmed using high-resolution transmission electron microscopy (HRTEM) after high temperature high pressure treatment of graphite in a diamond anvil cell. Our introduced approach for constructing the metastable phase diagram is general and broadly applicable to single and multi-component systems. |
Proceedings Inclusion? |
Planned: |
Keywords |
Machine Learning, Computational Materials Science & Engineering, Modeling and Simulation |