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Finite-temperature grain boundary phases, transformations, and diagrams in alloys
Abstract
Current understanding of alloy grain boundaries is limited by the incompleteness of atomistic simulation techniques, which either neglect entropy or artificially constrain the atomic density. This study introduces Monte Carlo simulations that simultaneously sample all the microscopic degrees of freedom in complex interfaces: position, configuration, and atom number. The method enables rigorous predictions of finite-temperature grain boundary structures, phase transformations, and diagrams in multicomponent materials. Simulations of W-V alloys demonstrate the necessity of the approach by uncovering a range of previously inaccessible phase transitions including condensation of interstitial solutes and transformation of dislocation structure.
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BibTeX
@misc{walsh2026finitetemperature,
title = {{Finite-temperature grain boundary phases, transformations, and diagrams in alloys}},
author = {Flynn Walsh and Timofey Frolov},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.34131},
eprint = {2609.34131},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.34131},
}
RIS
TY - UNPB
TI - Finite-temperature grain boundary phases, transformations, and diagrams in alloys
AU - Flynn Walsh
AU - Timofey Frolov
PY - 2026
DA - 2026/09/28
PB - arXiv
DO - 10.48550/arxiv.2609.34131
UR - https://arxiv.org/abs/2609.34131
AB - Current understanding of alloy grain boundaries is limited by the incompleteness of atomistic simulation techniques, which either neglect entropy or artificially constrain the atomic density. This study introduces Monte Carlo simulations that simultaneously sample all the microscopic degrees of freedom in complex interfaces: position, configuration, and atom number. The method enables rigorous predictions of finite-temperature grain boundary structures, phase transformations, and diagrams in multicomponent materials. Simulations of W-V alloys demonstrate the necessity of the approach by uncovering a range of previously inaccessible phase transitions including condensation of interstitial solutes and transformation of dislocation structure.
ER -