Segregation and diffusion behavior of niobium in a highly alloyed nickel-base superalloy
文献类型：期刊论文
| 作者 | X. L. Pan ; H. Y. Yu ; G. F. Tu ; W. R. Sun ; Z. Q. Hu |
| 刊名 | Transactions of Nonferrous Metals Society of China
 |
| 出版日期 | 2011 |
| 卷号 | 21期号:11页码:2402-2407 |
| 关键词 | GH742y superalloy niobium segregation diffusion directionally solidified superalloy inconel-718 alloy microstructure homogenization gamma' |
| ISSN号 | 1003-6326 |
| 中文摘要 | The segregation during solidification and high temperature diffusion during homogenization of niobium in a highly alloyed nickel-base superalloy were investigated. Niobium is seriously segregated into the interdendritic regions with segregation coefficient as high as 4.30. Various niobium-enriched phases including Laves phase, delta phase, (gamma+gamma') eutectic, MC and M(6)C types of carbides precipitated in the interdendritic regions. The soluble temperature of niobium-enriched phases and the degree of dendritic segregation were determined by differential thermal analysis and homogenization treatments at varied temperatures and times. The calculation of elemental diffusion indicates that the diffusion rate of niobium increases remarkably with the homogenization temperature increasing, so that the annealing time can be effectively reduced. A three-step homogenization treatment technology without incipient melting was established to eliminate the segregation of niobium and to obtain a uniform microstructure. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30612]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. L. Pan,H. Y. Yu,G. F. Tu,et al. Segregation and diffusion behavior of niobium in a highly alloyed nickel-base superalloy[J]. Transactions of Nonferrous Metals Society of China,2011,21(11):2402-2407. |
| APA | X. L. Pan,H. Y. Yu,G. F. Tu,W. R. Sun,&Z. Q. Hu.(2011).Segregation and diffusion behavior of niobium in a highly alloyed nickel-base superalloy.Transactions of Nonferrous Metals Society of China,21(11),2402-2407. |
| MLA | X. L. Pan,et al."Segregation and diffusion behavior of niobium in a highly alloyed nickel-base superalloy".Transactions of Nonferrous Metals Society of China 21.11(2011):2402-2407. |
入库方式： OAI收割
来源：金属研究所
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