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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.00867 |
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| _version_ | 1866918363633025024 |
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| author | Wang, Jin Luo, Fengping Chen, Yiheng Chen, Denghuang Zhang, Bowen Liu, Yuxin Wang, Guangyu Zhao, Yunbiao Mao, Sheng Chen, Mohan Zhou, Hong-Bo Xue, Jianming Wang, Yugang Wang, Chenxu |
| author_facet | Wang, Jin Luo, Fengping Chen, Yiheng Chen, Denghuang Zhang, Bowen Liu, Yuxin Wang, Guangyu Zhao, Yunbiao Mao, Sheng Chen, Mohan Zhou, Hong-Bo Xue, Jianming Wang, Yugang Wang, Chenxu |
| contents | Understanding the dynamic behavior of microstructures formed under fusion conditions is critical for designing high-performance structural materials for fusion reactors. Under fusion conditions, cavities of core-shell structures are formed due to the interaction between irradiation-induced vacancies and H and He atoms produced via transmutation. In this study, thermodynamic analysis and molecular dynamics simulations are combined to investigate the atomic-scale mechanisms and dynamic response of core-shell cavities formed in BCC-Fe under applied stress/strain fields. The thermodynamic analysis provides both the foundational reference for cavity structures under fusion neutron irradiation and the initial configurations for atomistic simulations. Building on this framework, atomic-scale simulations demonstrate that H and He play a decisive role in the stress-strain response and the evolution of elastic-plastic deformation within the cavities. In core-shell configurations, H atoms serve a function analogous to that in He-filled cavities, synergistically interacting with He to induce cavity deformation under mechanical loading. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_00867 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Stress-driven dynamic evolution of core-shell structured cavities with H and He in BCC-Fe under fusion conditions Wang, Jin Luo, Fengping Chen, Yiheng Chen, Denghuang Zhang, Bowen Liu, Yuxin Wang, Guangyu Zhao, Yunbiao Mao, Sheng Chen, Mohan Zhou, Hong-Bo Xue, Jianming Wang, Yugang Wang, Chenxu Materials Science Computational Physics Understanding the dynamic behavior of microstructures formed under fusion conditions is critical for designing high-performance structural materials for fusion reactors. Under fusion conditions, cavities of core-shell structures are formed due to the interaction between irradiation-induced vacancies and H and He atoms produced via transmutation. In this study, thermodynamic analysis and molecular dynamics simulations are combined to investigate the atomic-scale mechanisms and dynamic response of core-shell cavities formed in BCC-Fe under applied stress/strain fields. The thermodynamic analysis provides both the foundational reference for cavity structures under fusion neutron irradiation and the initial configurations for atomistic simulations. Building on this framework, atomic-scale simulations demonstrate that H and He play a decisive role in the stress-strain response and the evolution of elastic-plastic deformation within the cavities. In core-shell configurations, H atoms serve a function analogous to that in He-filled cavities, synergistically interacting with He to induce cavity deformation under mechanical loading. |
| title | Stress-driven dynamic evolution of core-shell structured cavities with H and He in BCC-Fe under fusion conditions |
| topic | Materials Science Computational Physics |
| url | https://arxiv.org/abs/2603.00867 |