| Segregation and diffusion behavior of niobium in a highly alloyed nickel-base superalloy | |
| X. L. Pan; H. Y. Yu; G. F. Tu; W. R. Sun; Z. Q. Hu | |
| 2011 | |
| 发表期刊 | Transactions of Nonferrous Metals Society of China
 |
| ISSN | 1003-6326 |
| 卷号 | 21期号:11页码:2402-2407 |
| 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. |
| 部门归属 | [pan xiao-lin; yu hai-yan; tu gan-feng] northeastern univ, sch met & mat, shenyang 110004, peoples r china. [sun wen-ru; hu zhuang-qi] chinese acad sci, inst met res, shenyang 110016, peoples r china.;pan, xl (reprint author), northeastern univ, sch met & mat, shenyang 110004, peoples r china;panxl@smm.neu.edu.cn |
| 关键词 | Gh742y Superalloy Niobium Segregation Diffusion Directionally Solidified Superalloy Inconel-718 Alloy Microstructure Homogenization Gamma' |
| URL | 查看原文 |
| WOS记录号 | WOS:000298152300010 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/30612 |
| 专题 | 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. |
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