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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
发表期刊JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
卷号34期号:3页码:541-550
摘要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.
部门归属[gong, li ; chen, bo ; du, zhanhui ; zhang, mengshu ; liu, ruichang ; liu, kui] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china
关键词Mc Carbide Microstructure Behavior Parameters Alloy
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79448
专题中国科学院金属研究所
通讯作者Chen, B (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
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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