Atomic insights into the ductile-brittle competition of cracks under dissolution
文献类型：期刊论文
| 作者 | Liu L(刘龙); Yuan QZ(袁泉子)
|
| 刊名 | EXTREME MECHANICS LETTERS
 |
| 出版日期 | 2024-12 |
| 卷号 | 73页码:102256 |
| 关键词 | Fracture Dissolution Cleavage Dislocation slip Brittle-ductile transition Molecular dynamics |
| ISSN号 | 2352-4316 |
| DOI | 10.1016/j.eml.2024.102256 |
| 英文摘要 | Environmental effects can determine the ductile-brittle behavior of cracks at the atomic scale, but the underlying processes remain poorly understood and contentious. Here, we report the competition between ductile and brittle behaviors at crack tips induced by the prevalent environmental effect of dissolution. Our findings reveal that this competition is driven by two fundamental deformation mechanisms related to dissolution: crack blunting and defect accumulation. Through separate evaluations of dissolution-induced cleavage and dissolution-induced plasticity, we demonstrate that these deformation mechanisms not only dominate brittle fracture toughness but also lead to dislocation slip. We have developed a theoretical model to predict the ductile and brittle behavior of cracks under dissolution, and the theory aligns well with the simulation results and remains consistent with existing experimental trends. This work will broaden the microscopic understanding of ductile and brittle fracture of cracks in complex environments. |
| 分类号 | 二类/Q1 |
| WOS研究方向 | Engineering ; Materials Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001357391000001 |
| 资助机构 | National Natural Science Founda-tion of China {12072346, 12032019] ; National Key Research and Development Program of China {2022YFA1203200] ; Strategic Priority Research Program of the Chinese Academy of Sciences {XDB0620103] |
| 其他责任者 | Yuan QZ |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97242]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.【Liu, Long & Yuan, Quanzi】 Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.【Liu, Long & Yuan, Quanzi】 Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu L,Yuan QZ. Atomic insights into the ductile-brittle competition of cracks under dissolution[J]. EXTREME MECHANICS LETTERS,2024,73:102256. |
| APA | 刘龙,&袁泉子.(2024).Atomic insights into the ductile-brittle competition of cracks under dissolution.EXTREME MECHANICS LETTERS,73,102256. |
| MLA | 刘龙,et al."Atomic insights into the ductile-brittle competition of cracks under dissolution".EXTREME MECHANICS LETTERS 73(2024):102256. |
入库方式： OAI收割
来源：力学研究所
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