Effects of Defect, Mean Stress and Lower Loading on High Cycle and Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy
文献类型：期刊论文
| 作者 | Guo YY(郭艺云)4,5; Wu, Lei3; Shang, Yibo1,2; Sun CQ(孙成奇)4,5
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| 刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| 出版日期 | 2025-01-05 |
| 页码 | 14 |
| 关键词 | Ti-6Al-4V titanium alloy Very high cycle fatigue Defect Stress ratio Lower stress amplitude |
| ISSN号 | 1006-7191 |
| DOI | 10.1007/s40195-024-01807-9 |
| 通讯作者 | Sun, Chengqi(scq@lnm.imech.ac.cn) |
| 英文摘要 | In this study, the effects of defect, mean stress and lower loading are investigated for high cycle (HCF) and very high cycle fatigue (VHCF) behavior of Ti-6Al-4V alloy. It indicates that the S-N curve of Ti-6Al-4V alloy exhibits a linear decreasing trend or a plateau characteristic in HCF and VHCF regimes, which depends on the defect size and stress ratio. VHCF strength decreases with increasing the defect size, and it is irrespective of stress ratios. The fatigue crack initiates from specimen surface at R = -1 in both HCF and VHCF regimes. While the fatigue crack initiates from the subsurface or the interior of the specimen at R = 0.1 in VHCF regime. A sequence of lower stress amplitude below the fatigue strength at 109 cyc has no or negligible influence on the fatigue life of 105-109 cyc. The lower stress amplitude in variable amplitude loadings does not affect the failure mechanism. The residual compressive stress relaxation is not observed after a large number of lower loadings under ultrasonic frequency fatigue test. Gerber formula and Goodman formula give dangerous predictions of VHCF strength for both smooth specimens and specimens with defects. |
| 分类号 | 二类 |
| WOS关键词 | CRACK INITIATION ; TITANIUM-ALLOY ; STRENGTH ; RATIO ; FAILURE ; DAMAGE ; LIFE |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620303] ; Natural Science Basic Research Program of Shanxi[2023-JC-QN-0044] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001389777200001 |
| 资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences ; Natural Science Basic Research Program of Shanxi |
| 其他责任者 | Sun, Chengqi |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/98077]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Air Force Engn Univ, Natl Key Lab Aerosp Power Syst & Plasma Technol, Xian 710038, Peoples R China 2.Air Force Engn Univ, Fundamentals Dept, Xian 710051, Peoples R China; 3.Guobiao Beijing Testing & Certifcat Co Ltd, Beijing 101400, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 5.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Guo YY,Wu, Lei,Shang, Yibo,et al. Effects of Defect, Mean Stress and Lower Loading on High Cycle and Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2025:14. |
| APA | 郭艺云,Wu, Lei,Shang, Yibo,&孙成奇.(2025).Effects of Defect, Mean Stress and Lower Loading on High Cycle and Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,14. |
| MLA | 郭艺云,et al."Effects of Defect, Mean Stress and Lower Loading on High Cycle and Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2025):14. |
入库方式： OAI收割
来源：力学研究所
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