Enhanced fatigue endurance limit of Cu through low-angle dislocation boundary
文献类型：期刊论文
| 作者 | Pan, Qingsong; Jing, Lijun; Lu, Lei |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2023 |
| 卷号 | 244页码:10 |
| 关键词 | Low-angle dislocation boundary Fatigue limit Cyclic deformation Surface roughening Cu |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2022.118542 |
| 通讯作者 | Lu, Lei(llu@imr.ac.cn) |
| 英文摘要 | How to remarkably elevate the high-cycle fatigue resistance of metallic materials under cyclic loading is a crucial, yet technically challenging issue for major structural applications. Either traditional strengthening ap-proaches or newly-developed hierarchical nanostructural modifications has been demonstrated to usually display a limited ability of enhancing the 107-cycle fatigue endurance limit. Here, we introduce massive nano-scaled low-angle dislocation boundaries in coarse grained pure Cu by means of simple drawing process, not only enhancing the tensile strength obviously, but also imparting a fatigue limit as high as 130 MPa and a fatigue ratio of 0.35, which is a record for pure Cu. Upon cyclic loading, the extensive activation of strongly confined dislocation slip within homogeneous dislocation cells (with cell size of about 300 nm) effectively mediates cyclic plastic strain with slightly cyclic softening. The elevated stress resistance of DC Cu to cyclic loading is primarily attributed to the high density of built-in low-angle dislocation cells, which are strong and also suppress local surface roughening and crack initiation, thereby contributing to an enhanced fatigue life. |
| 资助项目 | National Science Foundation of China (NSFC)[51931010] ; National Science Foundation of China (NSFC)[92163202] ; National Science Foundation of China (NSFC)[52122104] ; National Science Foundation of China (NSFC)[52071321] ; Key Research Program of Frontier Science and International Partnership Program[GJHZ2029] ; IMR Innovation Fund[2022-ZD02] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2019196] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000982515400001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Science Foundation of China (NSFC) ; Key Research Program of Frontier Science and International Partnership Program ; IMR Innovation Fund ; Youth Innovation Promotion Association, Chinese Academy of Sciences |
| 源URL | [http://ir.imr.ac.cn/handle/321006/177578]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lu, Lei |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pan, Qingsong,Jing, Lijun,Lu, Lei. Enhanced fatigue endurance limit of Cu through low-angle dislocation boundary[J]. ACTA MATERIALIA,2023,244:10. |
| APA | Pan, Qingsong,Jing, Lijun,&Lu, Lei.(2023).Enhanced fatigue endurance limit of Cu through low-angle dislocation boundary.ACTA MATERIALIA,244,10. |
| MLA | Pan, Qingsong,et al."Enhanced fatigue endurance limit of Cu through low-angle dislocation boundary".ACTA MATERIALIA 244(2023):10. |
入库方式： OAI收割
来源：金属研究所
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