The effect of Hafnium on the microstructure and tensile property in a Ni-based superalloy
文献类型：期刊论文
| 作者 | Li, Linzi1,2; Wu, Yunsheng1,3; Hou, Jieshan1,3; Gao, Shuang4; Zhou, Lanzhang1,3 |
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 30页码:2977-2985 |
| 关键词 | Hafnium Ni-based superalloy Tensile strength 6 phase Microstructure |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2024.04.049 |
| 通讯作者 | Hou, Jieshan(jshou@imr.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn) |
| 英文摘要 | The effects of Hafnium on the microstructure and tensile property of a Ni-based superalloy after solution heat treatment and long-term thermal exposure were investigated with field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), X-ray diffractometer (XRD). The results revealed reveal that Hf intensified intensifies the element segregation and promoted promotes the precipitation of MC carbide and honeycomb-like Ni5Hf phase in the as-cast alloy. The solid solution strengthening and second phase (MC) strengthening effects are both enhanced in the alloy doping 0.5 wt% Hf after solution heat treatment. Therefore, the tensile yield strength at 700 degrees C of the alloy with 0.5 wt% Hf is higher than that in the Hf-free alloy. Otherwise, a large amount of the low melting point Ni5Hf phases appear in the alloy with 0.8 wt% Hf. Ni5Hf phase is prone to become the crack initiation, which decreases diminishes the yield strength in the alloy with 0.8 wt% Hf. The addition of 0.5 wt% Hf can inhibit the formation of needle-like 6 phase at grain boundary due to the decrease of grain boundary energy and diffusion rate at grain boundary. Therefore, the 700 degrees C tensile strength and ductility increase simultaneously in the alloy with 0.5 wt% Hf after thermal exposure at 700 degrees C. |
| 资助项目 | National Natural Science Foundation of China[51571191] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001229756800003 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China |
| 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, Lanzhang |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 4.Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Linzi,Wu, Yunsheng,Hou, Jieshan,et al. The effect of Hafnium on the microstructure and tensile property in a Ni-based superalloy[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,30:2977-2985. |
| APA | Li, Linzi,Wu, Yunsheng,Hou, Jieshan,Gao, Shuang,&Zhou, Lanzhang.(2024).The effect of Hafnium on the microstructure and tensile property in a Ni-based superalloy.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,30,2977-2985. |
| MLA | Li, Linzi,et al."The effect of Hafnium on the microstructure and tensile property in a Ni-based superalloy".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 30(2024):2977-2985. |
入库方式： OAI收割
来源：金属研究所
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