| Coarsening mechanism of over-aged 6-Ni2Si nanoscale precipitates in Cu-Ni-Si-Cr-Mg alloy | |
| Li, Ying-Huan1,2; Chen, Shuai-Feng2; Wang, Song-Wei2; Song, Hong-Wu2; Zhang, Shi-Hong2 | |
| 通讯作者 | Song, Hong-Wu(hwsong@imr.ac.cn) |
| 2024-03-01 | |
| 发表期刊 | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| 卷号 | 209页码:12 |
| 摘要 | 6-Ni2Si precipitate is the crucial strengthening phase in Cu-Ni-Si alloy, and its coarsening behavior and mechanism impose dramatic effects on mechanical properties. In this paper, Cu-3Ni-0.7Si-0.1Cr-0.05 Mg (wt%) alloy was prepared to systematically investigate the coarsening behavior and elucidate the coarsening mechanism of 6-Ni2Si precipitate during over -aging treatment. Featured core -shell structure was observed via careful characterization during coarsening of 6-Ni2Si phase. Specifically, the core structure was stable 6-Ni2Si, while the shell structure was a metastable interface composed of Cu, Ni and Si elements. At later over -aging stage, the core -shell structure completely transformed into a stable and coarsened 6-Ni2Si phase being coherent with the Cu matrix. It is confirmed for the first time that the coarsening process of 6-Ni2Si precipitate can be interpreted by the transinterface -diffusion -controlled (TIDC) coarsening theory. The core -shell structure was caused by the disparity between the diffusion activation energy and diffusion rate of Ni, Si, and Cu from the perspective of diffusion kinetics. Moreover, the presence of trace amounts of Cr and Mg components exhibited little effect on the coarsening process of 6-Ni2Si. During over -aging, tensile strength dramatically decreased owing to diminishing precipitation strengthening effect from coarsening of 6-Ni2Si precipitates. |
| 关键词 | Cu-Ni-Si-Cr-Mg alloy 6-Ni2Si coarsening Core-shell structure TIDC theory Diffusion kinetics |
| 资助者 | Key Research and Development Program of Jiangxi Province ; CAS ; Institute of Metal Research, Chinese Academy of Sciences |
| DOI | 10.1016/j.matchar.2024.113693 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Key Research and Development Program of Jiangxi Province[20203ABC28W004] ; CAS[172GJHZ2022054GC] ; Institute of Metal Research, Chinese Academy of Sciences[E055A501] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS类目 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS记录号 | WOS:001179368300001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/184662 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Song, Hong-Wu |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ying-Huan,Chen, Shuai-Feng,Wang, Song-Wei,et al. Coarsening mechanism of over-aged 6-Ni2Si nanoscale precipitates in Cu-Ni-Si-Cr-Mg alloy[J]. MATERIALS CHARACTERIZATION,2024,209:12. |
| APA | Li, Ying-Huan,Chen, Shuai-Feng,Wang, Song-Wei,Song, Hong-Wu,&Zhang, Shi-Hong.(2024).Coarsening mechanism of over-aged 6-Ni2Si nanoscale precipitates in Cu-Ni-Si-Cr-Mg alloy.MATERIALS CHARACTERIZATION,209,12. |
| MLA | Li, Ying-Huan,et al."Coarsening mechanism of over-aged 6-Ni2Si nanoscale precipitates in Cu-Ni-Si-Cr-Mg alloy".MATERIALS CHARACTERIZATION 209(2024):12. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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