Correlation Between the Microstructural Defects and Residual Stress in a Single Crystal Nickel-Based Superalloy During Different Creep Stages
文献类型：期刊论文
| 作者 | Mo, FJ; Wu, ED; Zhang, CS; Wang, H; Zhong, ZY; Zhang, J1; Chen, B; Hofmann, M3; Gan, WM; Sun, GG |
| 刊名 | METALS AND MATERIALS INTERNATIONAL
 |
| 出版日期 | 2018-09-01 |
| 卷号 | 24期号:5页码:1002-1011 |
| ISSN号 | 1598-9623 |
| 关键词 | Superalloy Creep Microstructure Residual stress Neutron diffraction Tension |
| DOI | 10.1007/s12540-018-0106-7 |
| 英文摘要 | The present work attempts to reveal the correlation between the microstructural defects and residual stress in the single crystal nickel-based superalloy, both of which play the significant role on properties and performance. Neutron diffraction was employed to investigate the microstructural defects and residual stresses in a single crystal (SC) nickel-based superalloy, which was subjected to creeping under 220 MPa and 1000 A degrees C for different times. The measured superlattice and fundamental lattice reflections confirm that the mismatch and tetragonal distortions with c/a > 1 exist in the SC superalloy. At the initially unstrained state, there exists the angular distortion between gamma and gamma' phases with small triaxial compressive stresses, ensuring the structural stability of the superalloy. After creeping, the tetragonal distortion for the gamma phase is larger than that for the gamma' phase. With increasing the creeping time, the mismatch between gamma and gamma' phases increases to the maximum, then decreases gradually and finally remains unchanged. The macroscopic residual stress shows a similar behavior with the mismatch, indicating the correlation between them. Based on the model of shear and dislocations, the evolution of microstructural defects and residual stress are reasonably explained. The effect of shear is dominant at the primary creep stage, which greatly enlarges the mismatch and the residual stress. The dislocations weaken the effect of shear for the further creep stage, resulting in the decrease of the mismatch and relaxation of the residual stress. Those findings add some helpful understanding into the microstructure-performance relationship in the SC nickel-based superalloy, which might provide the insight to materials design and applications. |
| 学科主题 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000440153100009 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79992]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.China Acad Engn Phys, Inst Nucl Phys & Chem, Key Lab Neutron Phys, Mianyang 621999, Peoples R China 2.Inst Met Sci & Technol, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat, Inst Modern Phys, Shanghai EBIT Lab,Dept Nucl Sci & Technol, Shanghai 200433, Peoples R China 4.Tech Univ Munich, Forsch Neutronenquelle Heinz Maier Leibnitz FRM 2, D-85747 Garching, Germany 5.Helmholtz Ctr Geesthacht, German Engn Mat Sci Ctr MLZ, D-85747 Garching, Germany |
| 推荐引用方式 GB/T 7714 | Mo, FJ,Wu, ED,Zhang, CS,et al. Correlation Between the Microstructural Defects and Residual Stress in a Single Crystal Nickel-Based Superalloy During Different Creep Stages[J]. METALS AND MATERIALS INTERNATIONAL,2018,24(5):1002-1011. |
| APA | Mo, FJ.,Wu, ED.,Zhang, CS.,Wang, H.,Zhong, ZY.,...&Sun, GG.(2018).Correlation Between the Microstructural Defects and Residual Stress in a Single Crystal Nickel-Based Superalloy During Different Creep Stages.METALS AND MATERIALS INTERNATIONAL,24(5),1002-1011. |
| MLA | Mo, FJ,et al."Correlation Between the Microstructural Defects and Residual Stress in a Single Crystal Nickel-Based Superalloy During Different Creep Stages".METALS AND MATERIALS INTERNATIONAL 24.5(2018):1002-1011. |
入库方式： OAI收割
来源：金属研究所
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