| Plastic deformation induced strong and stable nanograined face-centered cubic Co | |
| Qi, Y. W.1,2; Luo, Z. P.1; Zhang, B.1,3; Li, X. Y.1,4 | |
| 通讯作者 | Luo, Z. P.(zpluo@imr.ac.cn) ; Li, X. Y.(xyli@imr.ac.cn) |
| 2025-03-01 | |
| 发表期刊 | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| 卷号 | 286页码:11 |
| 摘要 | Face-centered cubic (FCC) Co has been confirmed to exhibit excellent magnetic and catalytic properties as well as mechanical properties. However, its lattice structure is metastable at room temperature. In the present study, by using an accumulative high-pressure torsion treatment, a strong and stable nanograined FCC Co was generated through allotropic transformation coupled with mechanical relaxation processes. As the grain size of Co was refined to about 11 nm, HCP-FCC phase transformation was activated and formation of almost 100% nanograined FCC Co. This phase transformation was through twin faults generation on every (0001) plane continuously. The nanograined FCC Co shows superior thermal stability both in grain size and lattice structure. After annealing at 973 K for 30 min, no obvious grain coarsening or reverse phase transformation was observed. High-density stacking faults and twins in the nanograined FCC Co were formed by emitting partial dislocations from grain boundaries (GBs), which may relax the GBs and improve the thermal stability. The nanograined FCC Co with an average grain size of 11 nm exhibited a hardness of 7.98 GPa, showing a good combination of high strength and excellent thermal stability. |
| 关键词 | Cobalt Nanograined metal Deformation mechanism Thermal stability Phase transformation |
| 资助者 | National Nature Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Shi Changxu Innovation Center for Advanced Materials |
| DOI | 10.1016/j.actamat.2024.120691 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Nature Science Foundation of China[U2230205] ; National Nature Science Foundation of China[52225102] ; National Nature Science Foundation of China[52371125] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0510101] ; Shi Changxu Innovation Center for Advanced Materials |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS类目 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS记录号 | WOS:001439682200001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/179796 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Luo, Z. P.; Li, X. Y. |
| 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.Shenyang Aerosp Univ, Coll Aerosp Engn, Shenyang 110136, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 4.Liaoning Acad Mat, Shenyang 110167, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi, Y. W.,Luo, Z. P.,Zhang, B.,et al. Plastic deformation induced strong and stable nanograined face-centered cubic Co[J]. ACTA MATERIALIA,2025,286:11. |
| APA | Qi, Y. W.,Luo, Z. P.,Zhang, B.,&Li, X. Y..(2025).Plastic deformation induced strong and stable nanograined face-centered cubic Co.ACTA MATERIALIA,286,11. |
| MLA | Qi, Y. W.,et al."Plastic deformation induced strong and stable nanograined face-centered cubic Co".ACTA MATERIALIA 286(2025):11. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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