Coarsening mechanism of over-aged 6-Ni2Si nanoscale precipitates in Cu-Ni-Si-Cr-Mg alloy
文献类型：期刊论文
| 作者 | Li, Ying-Huan1,2; Chen, Shuai-Feng2; Wang, Song-Wei2; Song, Hong-Wu2; Zhang, Shi-Hong2 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2024-03-01 |
| 卷号 | 209页码:12 |
| 关键词 | Cu-Ni-Si-Cr-Mg alloy 6-Ni2Si coarsening Core-shell structure TIDC theory Diffusion kinetics |
| ISSN号 | 1044-5803 |
| DOI | 10.1016/j.matchar.2024.113693 |
| 通讯作者 | Song, Hong-Wu(hwsong@imr.ac.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:001179368300001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 资助机构 | Key Research and Development Program of Jiangxi Province ; CAS ; Institute of Metal Research, Chinese Academy of Sciences |
| 源URL |  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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