Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G
文献类型：期刊论文
| 作者 | Gong, Li; Chen, Bo; Yang, Yaqian; Du, Zhanhui; Liu, Kui; Chen, B (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China. |
| 刊名 | ELSEVIER SCIENCE SA
 |
| 出版日期 | 2017-07-31 |
| 卷号 | 701页码:111-119 |
| 关键词 | K417g Cast Superalloy Nitrogen Content Microsegregation Microstructure Mechanical Property |
| ISSN号 | 0921-5093 |
| 英文摘要 | This study investigates the effects of nitrogen (N) content (0.0005-0.0045 wt%) on the microsegregation, microstructures and high temperature mechanical properties of cast superalloy K417G. The results show that the segregation of Ti to interdendritic region becomes very serious with increased N content. In all three samples with different N contents, the alloys are typically dendritic morphology and gamma' phases show good cubic structure. With the N content increasing from 0.0005 wt% to 0.0045 wt%, the volume fraction of gamma' phase in the dendrite decreases, the sizes of gamma/gamma' eutectic and MC carbide increase, and the volume fractions of gamma/gamma' eutectic, MC carbide and micro-porosity firstly increase but then decrease. N addition changes the morphology of MC carbide from script-like shape to blocky shape, and Ti(C, N) is identified in the alloy with 0.0045 wt% N. With the N content increasing, the ultimate and yield strength decrease at elevated temperature, and the ductile and stress rupture life firstly have a sharp decrease and then have a slight increase. The specimen with the minimal content of N shows the best comprehensive mechanical properties.; This study investigates the effects of nitrogen (N) content (0.0005-0.0045 wt%) on the microsegregation, microstructures and high temperature mechanical properties of cast superalloy K417G. The results show that the segregation of Ti to interdendritic region becomes very serious with increased N content. In all three samples with different N contents, the alloys are typically dendritic morphology and gamma' phases show good cubic structure. With the N content increasing from 0.0005 wt% to 0.0045 wt%, the volume fraction of gamma' phase in the dendrite decreases, the sizes of gamma/gamma' eutectic and MC carbide increase, and the volume fractions of gamma/gamma' eutectic, MC carbide and micro-porosity firstly increase but then decrease. N addition changes the morphology of MC carbide from script-like shape to blocky shape, and Ti(C, N) is identified in the alloy with 0.0045 wt% N. With the N content increasing, the ultimate and yield strength decrease at elevated temperature, and the ductile and stress rupture life firstly have a sharp decrease and then have a slight increase. The specimen with the minimal content of N shows the best comprehensive mechanical properties. |
| 学科主题 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79172]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Chen, B (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Gong, Li,Chen, Bo,Yang, Yaqian,et al. Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G[J]. ELSEVIER SCIENCE SA,2017,701:111-119. |
| APA | Gong, Li,Chen, Bo,Yang, Yaqian,Du, Zhanhui,Liu, Kui,&Chen, B .(2017).Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G.ELSEVIER SCIENCE SA,701,111-119. |
| MLA | Gong, Li,et al."Effect of N content on microsegregation, microstructure and mechanical property of cast Ni-base superalloy K417G".ELSEVIER SCIENCE SA 701(2017):111-119. |
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来源：金属研究所
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