Toward an understanding of dwell fatigue damage mechanism of bimodal Ti-6Al-4V alloys
文献类型：期刊论文
| 作者 | Zeng, L. R.1,2; Lei, L. M.3; Luo, X. M.2; Zhang, G. P.2 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2022-05-10 |
| 卷号 | 108页码:244-255 |
| ISSN号 | 1005-0302 |
| 关键词 | Dwell effect Fatigue damage Stress relaxation Volume fraction of primary alpha phase Quasi-in-situ testing |
| DOI | 10.1016/j.jmst.2021.08.041 |
| 通讯作者 | Zhang, G. P.(gpzhang@imr.ac.cn) |
| 英文摘要 | Dwell fatigue effect is a long-standing problem threatening the long-term service reliability for fan blades and fan disks of an aircraft engine. To understand the basic mechanism of dwell fatigue damage, pure fatigue and 60 s dwell fatigue properties of bimodal Ti-6Al-4V alloys with different volume fractions of the primary alpha (alpha(p)) phase were examined comparatively. The results showed that both pure fatigue and dwell fatigue life decreased with increasing the volume fraction of the alpha(p) phase and the dwell fatigue life was lower than the pure fatigue one. The quasi-in-situ test results and the quantitative characterization of damage behaviors of the local microstructure units defined by the alpha(p)-secondary alpha (alpha(s)) combination reveal that the alpha(s) phase close to the alpha(p) phase with extensively slip activities was gradually damaged under dwell fatigue loading, while that under pure fatigue loading was undamaged, demonstrating that the dwell loading induced the damage of the alpha(s) phase, and further reduced the fatigue life. A stress relaxation-based model is proposed to describe the physical mechanism on dwell fatigue damage of the bimodal Ti-6Al-4V alloy, i.e. the elastic deformation of the alpha(s) phase caused by the strain incompatibility would be gradually transformed into plastic deformation during the dwell stage, and thus promotes fatigue damage. The model provides new insights into the microscopic process of stress/strain transfer between the soft and hard microstructure units under dwell fatigue loading. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| 资助项目 | National Natural Science Foundation of China[51771207] ; National Natural Science Foundation of China[52171128] ; Fundamental Research Project of Shenyang National Laboratory for Materials Science[L2019R18] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| WOS记录号 | WOS:000787716200006 |
| 资助机构 | National Natural Science Foundation of China ; Fundamental Research Project of Shenyang National Laboratory for Materials Science |
| 源URL | [http://ir.imr.ac.cn/handle/321006/172644]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, G. P. |
| 作者单位 | 1.Chengdu Univ, Sch Mech Engn, Chengdu 610106, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.AECC Shanghai Commercial Aircraft Engine Mfg Co L, Shanghai 201306, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, L. R.,Lei, L. M.,Luo, X. M.,et al. Toward an understanding of dwell fatigue damage mechanism of bimodal Ti-6Al-4V alloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,108:244-255. |
| APA | Zeng, L. R.,Lei, L. M.,Luo, X. M.,&Zhang, G. P..(2022).Toward an understanding of dwell fatigue damage mechanism of bimodal Ti-6Al-4V alloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,108,244-255. |
| MLA | Zeng, L. R.,et al."Toward an understanding of dwell fatigue damage mechanism of bimodal Ti-6Al-4V alloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 108(2022):244-255. |
入库方式： OAI收割
来源：金属研究所
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