Strain-Induced BCC-to-FCC Transformation in Tungsten Uncovered by Molecular Dynamics Simulations with Machine Learning Potentials
Abstract
Polymorphic transformations occur in a minority of metals. Tungsten is not one of them. This observation does not rule out its intrinsic phase transition possibility, but may be due to inaccessible thermodynamic and mechanical conditions in conventional experiments. Herein, we investigate the body centered cubic (BCC) to face centered cubic (FCC) transformation in tungsten via a rigorously validated machine learning potential (MLP) molecular dynamics (MD) approach. Our simulations demonstrate that strain induced BCC to FCC transformation indeed occurs in tungsten. The FCC phase exceeds 20 at.% at low temperature and in the presence of dislocations. In the perfect crystal moderate temperatures favor phase transformation kinetics. Structural analysis confirms the transformation following the Bain and Nishiyama Wassermann orientation relationship. These results establish the viability of strain induced polymorphic transformation in tungsten and provide a critical guideline for the experimental production of duplex tungsten with enhanced ductility addressing a longstanding challenge in tungsten material engineering for high-temperature structural applications.
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BibTeX
@misc{hu2026straininduced,
title = {{Strain-Induced BCC-to-FCC Transformation in Tungsten Uncovered by Molecular Dynamics Simulations with Machine Learning Potentials}},
author = {Qiu-Hong Hu and YueYue Wang and Xinyi Leng and Hezhu Shao and Luru Dai},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.38477},
eprint = {2610.38477},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.38477},
}
RIS
TY - UNPB
TI - Strain-Induced BCC-to-FCC Transformation in Tungsten Uncovered by Molecular Dynamics Simulations with Machine Learning Potentials
AU - Qiu-Hong Hu
AU - YueYue Wang
AU - Xinyi Leng
AU - Hezhu Shao
AU - Luru Dai
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2610.38477
UR - https://arxiv.org/abs/2610.38477
AB - Polymorphic transformations occur in a minority of metals. Tungsten is not one of them. This observation does not rule out its intrinsic phase transition possibility, but may be due to inaccessible thermodynamic and mechanical conditions in conventional experiments. Herein, we investigate the body centered cubic (BCC) to face centered cubic (FCC) transformation in tungsten via a rigorously validated machine learning potential (MLP) molecular dynamics (MD) approach. Our simulations demonstrate that strain induced BCC to FCC transformation indeed occurs in tungsten. The FCC phase exceeds 20 at.% at low temperature and in the presence of dislocations. In the perfect crystal moderate temperatures favor phase transformation kinetics. Structural analysis confirms the transformation following the Bain and Nishiyama Wassermann orientation relationship. These results establish the viability of strain induced polymorphic transformation in tungsten and provide a critical guideline for the experimental production of duplex tungsten with enhanced ductility addressing a longstanding challenge in tungsten material engineering for high-temperature structural applications.
ER -