Atomistic insights into the influence of hydrogen on crack propagation in tungsten
文献类型：期刊论文
| 作者 | Shi, Jun; Li, Bingchen; Li, Lei; Liu, Yifan; Fan, Xinyue; Peng Q(彭庆); Liang, Linyun; Jin, Shuo; Lu, Guanghong |
| 刊名 | FUSION ENGINEERING AND DESIGN
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 197页码:11 |
| ISSN号 | 0920-3796 |
| 关键词 | Molecular dynamics simulation Hydrogen Crack propagation Plasma-facing materials Tungsten |
| DOI | 10.1016/j.fusengdes.2023.114030 |
| 通讯作者 | Liang, Linyun(lyliang@buaa.edu.cn) ; Jin, Shuo(jinshuo@buaa.edu.cn) |
| 英文摘要 | Tungsten (W) is regarded as a viable choice for plasma-facing materials in nuclear fusion reactors. However, its mechanical properties are significantly degraded by hydrogen (H) atoms during irradiation, of which the mechanism is still elusive. In this study, we conduct molecular dynamics (MD) simulations to study the impact of H atoms on the propagation of a crack in single crystal W. The results show that the propagation rate of the crack slows down with increasing temperature. This is due to the enhanced plastic deformation, leading to blunting of the crack tip. A pre-existing crack in W is then considered at various temperatures and uniaxial applied tensile strain conditions. The propagation rate of the crack decreases with the increase of the applied tensile strain rate. This phenomenon occurs due to the relaxation of the stress around the crack tip following the emission of the dislocation at high strain rates. After introducing H atoms, it can be observed that at low temperatures, H im-pedes the propagation of the crack, while at high temperatures, H promotes it. This is primarily due to the formation of voids at the slip traces of dislocations and the reduction in surface energy. Additionally, the crack tip becomes blunted and its propagation rate decreases with increasing strain rate. These results indicate that providing sufficient time for H atoms to migrate is a key factor affecting the mechanical properties of W. The current results provide valuable insights into understanding the interaction mechanism of a crack and H atoms in W. |
| 分类号 | 二类 |
| WOS关键词 | SINGLE-CRYSTAL ; STRAIN-RATE ; TRANSITION ; PLASTICITY ; TIP ; EMBRITTLEMENT ; SIMULATION ; MECHANISM ; BRITTLE ; STRESS |
| 资助项目 | National MCF Energy R & D Program of China[2018YFE0308103] ; National Natural Science Foundation of China[12075021] ; National Natural Science Foundation of China[12075023] ; National Natural Science Foundation of China[12272378] ; LiYing Program of the Institute of Mechanics, Chinese Academy of Sciences[E1Z1011001] ; High-level Innovation Research Institute Program of Guangdong Province[2020B0909010003] |
| WOS研究方向 | Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:001098538500001 |
| 资助机构 | National MCF Energy R & D Program of China ; National Natural Science Foundation of China ; LiYing Program of the Institute of Mechanics, Chinese Academy of Sciences ; High-level Innovation Research Institute Program of Guangdong Province |
| 其他责任者 | Liang, Linyun ; Jin, Shuo |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/93370]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Shi, Jun,Li, Bingchen,Li, Lei,et al. Atomistic insights into the influence of hydrogen on crack propagation in tungsten[J]. FUSION ENGINEERING AND DESIGN,2023,197:11. |
| APA | Shi, Jun.,Li, Bingchen.,Li, Lei.,Liu, Yifan.,Fan, Xinyue.,...&Lu, Guanghong.(2023).Atomistic insights into the influence of hydrogen on crack propagation in tungsten.FUSION ENGINEERING AND DESIGN,197,11. |
| MLA | Shi, Jun,et al."Atomistic insights into the influence of hydrogen on crack propagation in tungsten".FUSION ENGINEERING AND DESIGN 197(2023):11. |
入库方式： OAI收割
来源：力学研究所
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