Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide
文献类型：期刊论文
| 作者 | Qin, X. Z.1,2; Wang, J. Q.2,3; Cheng, S. H.2,3; Wu, Y. S.1,2; Zhou, L. Z.1,2 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2023-08-10 |
| 卷号 | 881页码:11 |
| 关键词 | Cast Ni-based superalloys Primary MC carbide Thermal stability Long-term thermal exposure Microstructure Stress rupture property |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2023.145416 |
| 通讯作者 | Qin, X. Z.(xzqin@imr.ac.cn) ; Zhou, L. Z.(lzz@imr.ac.cn) |
| 英文摘要 | The role and behavior of primary MC carbide and their effects on the microstructure and stress rupture property of the cast Ni-based superalloys during long-term thermal exposure at elevated temperature are systemically investigated in this work. It is found that the chemical compositions of primary MC are proportional to the Nb/Ti and (Ti + Nb)/(Mo + W) ratios of alloys. During long-term thermal exposure, the thermal stability of primary MC can be quantitatively evaluated by its decomposition degree defined as Dt=(V0-Vt)/V0 x 100%, which is closely associated with the Nb/Ti and (Mo + W)/Cr ratios of alloys. The decomposition process, degree, form and mechanism of primary MC are revealed in detail. The STEM observations with the EDS analyses show that primary MC decomposition is an inter-diffusion process of elements between the primary MC carbide and & gamma; matrix, which can increase the volume fraction of & gamma;' phase, restrain the precipitation of topologically closepacked (TCP) phases and promote the coarsening of grain boundaries (GBs). The combination of these microstructural evolutions, together with the appropriate Al + Ti + Nb and W + Mo contents in the matrix, eventually results in a remarkable improvement in the stress rupture property of long-term thermally exposed cast Ni-based superalloys. |
| 资助项目 | National Natural Science Foundation of China[51001101] ; National Natural Science Foundation of China[NY20150102] ; National Energy Adminis-tration Program of China ; [51871213] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001058186900001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; National Energy Adminis-tration Program of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/179002]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Qin, X. Z.; Zhou, L. Z. |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, X. Z.,Wang, J. Q.,Cheng, S. H.,et al. Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,881:11. |
| APA | Qin, X. Z.,Wang, J. Q.,Cheng, S. H.,Wu, Y. S.,&Zhou, L. Z..(2023).Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,881,11. |
| MLA | Qin, X. Z.,et al."Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 881(2023):11. |
入库方式： OAI收割
来源：金属研究所
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