More severe surface relief but stronger fatigue resistance at small scales: Vacancy-assisted fatigue damage mechanism
文献类型：期刊论文
| 作者 | Chen, Honglei1; Luo, Xuemei1; Zhang, Mingyuan1,2; Wen, Ming3; Zhu, Xiaofei1; Zhang, Guangping1 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 274页码:15 |
| 关键词 | Extrusion Fatigue Vacancies Damage mechanism Nanocrystal |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2024.120028 |
| 通讯作者 | Luo, Xuemei(xmluo@imr.ac.cn) ; Zhang, Guangping(gpzhang@imr.ac.cn) |
| 英文摘要 | Surface relief in forms of extrusions and intrusions as the substantial feature of early fatigue damage is one of the most important phenomena studied in metal fatigue. The most common surface relief models in bulk metals are agreed to be correlated with the formation of typical dislocation patterns as persistent slip bands (PSBs), while little is known about the fundamental mechanisms at submicron and even nanometer scales where dislocation pattern formation is fully inhibited. Here, as exampled with thin Au films, the underlying fatigue damage mechanism at small scales is investigated through the quantitative characterization of fatigue damages. Continuous generation and migration of vacancies is found to be crucial for the shape of extrusion/intrusions and kinetics of their growth at submicron and even nanometer scales. Due to the degraded dislocation interaction and intensified vacancy diffusion, the delayed vacancy accumulation in the small-scale metal interior suppresses the extrusion and interface void formation in thinner films, which finally leads to the superior ability to support tremendous surface relief and strong fatigue resistance. The finding of the vacancy-dominated fatigue mechanism at small scales extends our understanding of the metal fatigue mechanisms down to the submicron and even nanometer scales and suggests a novel interface engineering strategy by vacancy behavior modulation for fatigue-tolerance material design. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[52071319] ; Yunnan Province Expert Workstation Project[202305AF150171] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0510303] ; Foundation for Outstanding Young Scholar - Institute of Metal Research (IMR) |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001265950800001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; Yunnan Province Expert Workstation Project ; Strategic Priority Research Program of Chinese Academy of Sciences ; Foundation for Outstanding Young Scholar - Institute of Metal Research (IMR) |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Luo, Xuemei; Zhang, Guangping |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Sino Platinum Met Co Ltd, 988 Keji Rd,High Tech Dev Zone, Kunming 650106, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Honglei,Luo, Xuemei,Zhang, Mingyuan,et al. More severe surface relief but stronger fatigue resistance at small scales: Vacancy-assisted fatigue damage mechanism[J]. ACTA MATERIALIA,2024,274:15. |
| APA | Chen, Honglei,Luo, Xuemei,Zhang, Mingyuan,Wen, Ming,Zhu, Xiaofei,&Zhang, Guangping.(2024).More severe surface relief but stronger fatigue resistance at small scales: Vacancy-assisted fatigue damage mechanism.ACTA MATERIALIA,274,15. |
| MLA | Chen, Honglei,et al."More severe surface relief but stronger fatigue resistance at small scales: Vacancy-assisted fatigue damage mechanism".ACTA MATERIALIA 274(2024):15. |
入库方式： OAI收割
来源：金属研究所
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