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| Investigation of Solidification and Segregation Characteristics of Cast Ni-Base Superalloy K417G | |
| Gong, L; Chen, B; Du, ZH; Zhang, MS; Liu, RC; Liu, K; Chen, B (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China. | |
| 2018-03-01 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 34Issue:3Pages:541-550 |
| Abstract | Differential scanning calorimetry (DSC) analysis, isothermal solidification experiment and Thermo-Calc simulation were employed to investigate solidification characteristics of K417G Ni-base superalloy. Electron probe microanalysis (EPMA) was employed to analyze the segregation characteristics. Liquidus, solidus and the formation temperatures of main phases were measured. In the process of solidification, the volume fraction of liquid dropped dramatically in the initial stage, while the dropping rate became very low in the final stage due to severe segregation of positive segregation elements into the residual liquid. The solidification began with the formation of primary gamma. Then with solidification proceeding, Ti and Mo were enriched in the liquid interdendrite, which resulted in the precipitation of MC carbides in the interdendrite. Al accumulated into liquid at the initial stage, but gathered to solid later due to the precipitation of gamma/gamma' eutectic at the intermediate stage of solidification. However, Co tended to segregate toward the solid phase. In the case of K417G alloy, combining DSC analysis and isothermal solidification experiment is a good way to investigate the solidification characteristics. Thermo-Calc simulation can serve as reference to investigate K417G alloy. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.; Differential scanning calorimetry (DSC) analysis, isothermal solidification experiment and Thermo-Calc simulation were employed to investigate solidification characteristics of K417G Ni-base superalloy. Electron probe microanalysis (EPMA) was employed to analyze the segregation characteristics. Liquidus, solidus and the formation temperatures of main phases were measured. In the process of solidification, the volume fraction of liquid dropped dramatically in the initial stage, while the dropping rate became very low in the final stage due to severe segregation of positive segregation elements into the residual liquid. The solidification began with the formation of primary gamma. Then with solidification proceeding, Ti and Mo were enriched in the liquid interdendrite, which resulted in the precipitation of MC carbides in the interdendrite. Al accumulated into liquid at the initial stage, but gathered to solid later due to the precipitation of gamma/gamma' eutectic at the intermediate stage of solidification. However, Co tended to segregate toward the solid phase. In the case of K417G alloy, combining DSC analysis and isothermal solidification experiment is a good way to investigate the solidification characteristics. Thermo-Calc simulation can serve as reference to investigate K417G alloy. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| description.department | [gong, li ; chen, bo ; du, zhanhui ; zhang, mengshu ; liu, ruichang ; liu, kui] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china |
| Keyword | Mc Carbide Microstructure Behavior Parameters Alloy |
| Subject Area | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/79448 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Chen, B (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China. |
| Recommended Citation GB/T 7714 | Gong, L,Chen, B,Du, ZH,et al. Investigation of Solidification and Segregation Characteristics of Cast Ni-Base Superalloy K417G[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(3):541-550. |
| APA | Gong, L.,Chen, B.,Du, ZH.,Zhang, MS.,Liu, RC.,...&Chen, B .(2018).Investigation of Solidification and Segregation Characteristics of Cast Ni-Base Superalloy K417G.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(3),541-550. |
| MLA | Gong, L,et al."Investigation of Solidification and Segregation Characteristics of Cast Ni-Base Superalloy K417G".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.3(2018):541-550. |
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