A Study of the Internal Deformation Fields and the Related Microstructure Evolution during Thermal Fatigue Tests of a Single-Crystal Ni-Base Superalloy
文献类型：期刊论文
| 作者 | Zong, Cui1; Liu, Sujie2; Ma, Guangcai2; Guo, Yi2; Huang, Zhaohui1 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2024-06-01 |
| 卷号 | 17期号:12页码:17 |
| 关键词 | stress fields dislocation density distribution HR-EBSD thermal fatigue |
| DOI | 10.3390/ma17122821 |
| 通讯作者 | Guo, Yi(yguo@imr.ac.cn) |
| 英文摘要 | Ni-base superalloys operate in harsh service conditions where cyclic heating and cooling introduce deformation fields that need to be investigated in detail. We used the high-angular-resolution electron backscatter diffraction method to study the evolution of internal stress fields and dislocation density distributions in carbides, dendrites, and notch tips. The results indicate that the stress concentrations decay exponentially away from the notch, and this pattern of distribution was modified by the growth of cracks and the emission of dislocations from the crack tip. Crack initiation follows crystallographic traces and is weakly correlated with carbides and dendrites. Thermal cycles introduce local plasticity around carbides, the dendrite boundary, and cracks. The dislocations lead to higher local stored energy than the critical value that is often cited to induce recrystallization. No large-scale onset of recrystallization was detected, possibly due to the mild temperature (800 degrees C); however, numerous recrystallized grains were detected in carbides after 50 and 80 cycles. The results call for a detailed investigation of the microstructure-related, thermally assisted recrystallization phenomenon and may assist in the microstructure control and cooling channel design of turbine blades. |
| 资助项目 | National Natural Science Foundation of China[52201149] ; National Science and Technology Major Project[J2019-VI-0023-0139] ; National Science and Technology Major Project[J2019-VI-0019-0134] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001255799400001 |
| 出版者 | MDPI |
| 资助机构 | National Natural Science Foundation of China ; National Science and Technology Major Project |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Guo, Yi |
| 作者单位 | 1.Beijing Inst Aeronaut Mat, Natl Key Lab Adv High Temp Struct Mat, Beijing 100095, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zong, Cui,Liu, Sujie,Ma, Guangcai,et al. A Study of the Internal Deformation Fields and the Related Microstructure Evolution during Thermal Fatigue Tests of a Single-Crystal Ni-Base Superalloy[J]. MATERIALS,2024,17(12):17. |
| APA | Zong, Cui,Liu, Sujie,Ma, Guangcai,Guo, Yi,&Huang, Zhaohui.(2024).A Study of the Internal Deformation Fields and the Related Microstructure Evolution during Thermal Fatigue Tests of a Single-Crystal Ni-Base Superalloy.MATERIALS,17(12),17. |
| MLA | Zong, Cui,et al."A Study of the Internal Deformation Fields and the Related Microstructure Evolution during Thermal Fatigue Tests of a Single-Crystal Ni-Base Superalloy".MATERIALS 17.12(2024):17. |
入库方式： OAI收割
来源：金属研究所
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