Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy
文献类型：期刊论文
| 作者 | Fan, Zhongding1; Wang, Xinguang2; Yang, Yanhong2; Chen, Hao1; Yang, Zhigang1; Zhang, Chi1 |
| 刊名 | METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
 |
| 出版日期 | 2020-05-01 |
| 卷号 | 51期号:5页码:2495-2508 |
| ISSN号 | 1073-5623 |
| DOI | 10.1007/s11661-020-05710-7 |
| 通讯作者 | Zhang, Chi(chizhang@tsinghua.edu.cn) |
| 英文摘要 | Exploring the alloying effect of various elements plays a crucial role in optimizing the alloy design for superalloys. In this study, the influence of Nb additions on a gamma '-strengthening CoNi-based superalloy has been investigated. Undesirable intermetallic phases including the topologically close-packed D8(5) phase and the ordered D0(19) phase were observed to preferentially form in the dendritic and interdendritic regions of the investigated alloy, respectively. Precipitation behaviors of the D0(19) phase and the D8(5) phase including growth mechanisms and crystallographic orientation relationships have been characterized and analyzed in detail using advanced electron microscopy techniques. First-principle calculations using density function theory have been carried out to evaluate the effect of Nb additions on the thermodynamic stability of the L1(2)-gamma ' phase. It turns out that the supercell with L1(2) structure would be energetically destabilized when the Nb-substituted atom sits on the Co or Al sites, which could correspond to the microstructural instability of the Nb-containing CoNi-based superalloy. |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000523180700044 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.imr.ac.cn/handle/321006/138091]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, Chi |
| 作者单位 | 1.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, Minist Educ, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Zhongding,Wang, Xinguang,Yang, Yanhong,et al. Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2020,51(5):2495-2508. |
| APA | Fan, Zhongding,Wang, Xinguang,Yang, Yanhong,Chen, Hao,Yang, Zhigang,&Zhang, Chi.(2020).Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,51(5),2495-2508. |
| MLA | Fan, Zhongding,et al."Microstructural Instability and Precipitation Behaviors of Intermetallic Phases in a Nb-Containing CoNi-Based Superalloy".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 51.5(2020):2495-2508. |
入库方式： OAI收割
来源：金属研究所
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