The evolution of carbides during long-term creep/aging of nickel based superalloy K444
文献类型：期刊论文
| 作者 | Cai, Hang1,2; Hou, Jieshan1; Guo, Yong-an1; Xing, Jing1,2; Zhou, Lan-zhang1 |
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2024 |
| 卷号 | 28页码:3631-3640 |
| 关键词 | Ni -based superalloy Long -term aging Carbides degradation Grain boundaries Applied stress |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2023.12.236 |
| 通讯作者 | Hou, Jieshan(jshou@imr.ac.cn) ; Zhou, Lan-zhang(lzz@imr.ac.cn) |
| 英文摘要 | In K444 alloy, the evolution of carbides during stress aging (creep) and stress-free aging at 900 degrees C for 5000 h, and interrupted at 3000 h were investigated, combining microstructure characterization and quantitative statistics method. After stress-free aging for 5000 h, the volume fraction of intragranular MC and M6C carbides decrease from 0.48 % to 0.66 %-0.26 % and 0.48 %, respectively, while that of M23C6 carbides increase to 0.28 %. The two degradation behaviors can be concluded as MC + gamma -> M6C + M23C6 + gamma ' and M6C + gamma -> M23C6 + gamma ' respectively. The former controlled by the diffusion of Ti occurred earlier, while the latter determined by the diffusion of W and Mo mainly happened later. The applied stress did not change degradation reactions while accelerate the degradation rate slightly. During stress-free aging, the morphology of grain boundaries (GBs) changed from discrete distribution to semi-continuous and then to continuous chain, and the content of MC and M6C carbides decreases while that of M23C6 carbides increases. The applied stress markedly promotes above behaviors. Especially, the completed continuous chain formed before 3000 h. Moreover, the applied stress induced the formation of cavitation on the GBs, which is attributed to the following reasons. First, it can accelerate the degradation of GBs and decline the GBs strength. What's more, dislocations pile up on the GBs and cause a high level of stress concentration. Finally, the new generated phase interfaces have a greater deviation with its adjacent carbides, weakening the binding force of GBs. |
| 资助项目 | National Science and Technology Major Project[Y2019-VII-001 1-0151] ; National Natural Science Foundation of China (NSFC)[51571191] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001155154300001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Science and Technology Major Project ; National Natural Science Foundation of China (NSFC) |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Hou, Jieshan; Zhou, Lan-zhang |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Hang,Hou, Jieshan,Guo, Yong-an,et al. The evolution of carbides during long-term creep/aging of nickel based superalloy K444[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,28:3631-3640. |
| APA | Cai, Hang,Hou, Jieshan,Guo, Yong-an,Xing, Jing,&Zhou, Lan-zhang.(2024).The evolution of carbides during long-term creep/aging of nickel based superalloy K444.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,28,3631-3640. |
| MLA | Cai, Hang,et al."The evolution of carbides during long-term creep/aging of nickel based superalloy K444".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 28(2024):3631-3640. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。