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General-purpose machine-learned potential for 16 elemental metals and their alloys

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arxiv 2311.04732 v2 pith:MNODAH27 submitted 2023-11-08 cond-mat.mtrl-sci physics.comp-ph

classification cond-mat.mtrl-sciphysics.comp-ph
keywords alloysgeneral-purposeunifiedapproachchemicalelementalelementsmachine-learned
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Machine-learned potentials (MLPs) have exhibited remarkable accuracy, yet the lack of general-purpose MLPs for a broad spectrum of elements and their alloys limits their applicability. Here, we present a feasible approach for constructing a unified general-purpose MLP for numerous elements, demonstrated through a model (UNEP-v1) for 16 elemental metals and their alloys. To achieve a complete representation of the chemical space, we show, via principal component analysis and diverse test datasets, that employing one-component and two-component systems suffices. Our unified UNEP-v1 model exhibits superior performance across various physical properties compared to a widely used embedded-atom method potential, while maintaining remarkable efficiency. We demonstrate our approach's effectiveness through reproducing experimentally observed chemical order and stable phases, and large-scale simulations of plasticity and primary radiation damage in MoTaVW alloys. This work represents a significant leap towards a unified general-purpose MLP encompassing the periodic table, with profound implications for materials science.

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  1. Exploring the energy landscape of aluminas through machine learning interatomic potential

    cond-mat.mtrl-sci 2024-12 conditional novelty 7.0 of 10

    A neuroevolution machine learning potential for aluminas is trained on DFT data and used to map transition alumina and high-pressure phase boundaries and to search gamma-Al2O3 cation arrangements.

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