Crack initiation mechanism and fatigue life of titanium alloy Ti-6Al-2Sn-2Zr-3Mo-X: Effects of stress ratio and loading frequency
文献类型：期刊论文
| 作者 | Sun CQ(孙成奇) ; Li YQ; Huang RX; Wang L; Liu JL; Zhou LL(周玲玲); Duan GH(段桂花)
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| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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| 出版日期 | 2020-11-04 |
| 卷号 | 798页码:140265 |
| ISSN号 | 0921-5093 |
| 关键词 | Ti-6Al-2Sn-2Zr-3Mo-X HIGH-CYCLE FATIGUE Stress ratio TI-6AL-4V Frequency ALPHA Crack initiation mechanism BEHAVIOR Fatigue life FAILURE MICROSTRUCTURE STRENGTH SIZE |
| DOI | 10.1016/j.msea.2020.140265 |
| 英文摘要 | In this paper, the fatigue behavior of Ti-6Al-2Sn-2Zr-3Mo-X alloy with basketweave microstructure is investigated at stress ratios R=-1,-0.5, 0.1 and 0.3 and loading frequencies f=0.4 Hz, 4 Hz and 35 Hz. It is shown that the Ti-6Al-2Sn-2Zr-3Mo-X alloy presents two different crack initiation mechanisms. One is due to the cleavage of alpha grains and the other is due to the microstructure inhomogeneity and deformation incompatibility. For the former case, the fracture surface exhibits facet feature in the crack initiation region. For the latter case, the crack nucleates and initiates at alpha grains or interfaces and the fracture surface presents no facet feature in the crack initiation region. The higher stress ratio and the lower frequency tend to induce the higher probability for the occurrence of multiple crack initiation mode. Moreover, the paper indicates that the effect of stress ratio on fatigue life could be expressed as N-f=A [(1-R)/2}(l)sigma(m)(a,R), where A, l and m are material parameters. The scatter of fatigue life is related to both the stress amplitude and the loading frequency. For relative higher stress amplitude, the fatigue life and the frequency at R=-1 could be correlated by a linear relation in log-log scale. |
| 分类号 | 一类 |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000587608800001 |
| 资助机构 | National Key Research and Development Program of China [2017YFC0305500} |
| 其他责任者 | Sun, CQ |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/85427]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.{Liu Jialong} Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China 2.{Li Yanqing, Huang Ruxu, Wang Lei} China Ship Sci Res Ctr State Key Lab Deep Sea Manned Vehicles Wuxi 214082 Jiangsu Peoples R China 3.{Sun Chengqi} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 4.{Sun Chengqi, Zhou Lingling, Duan Guihua} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun CQ,Li YQ,Huang RX,et al. Crack initiation mechanism and fatigue life of titanium alloy Ti-6Al-2Sn-2Zr-3Mo-X: Effects of stress ratio and loading frequency[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,798:140265. |
| APA | 孙成奇.,Li YQ.,Huang RX.,Wang L.,Liu JL.,...&段桂花.(2020).Crack initiation mechanism and fatigue life of titanium alloy Ti-6Al-2Sn-2Zr-3Mo-X: Effects of stress ratio and loading frequency.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,798,140265. |
| MLA | 孙成奇,et al."Crack initiation mechanism and fatigue life of titanium alloy Ti-6Al-2Sn-2Zr-3Mo-X: Effects of stress ratio and loading frequency".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 798(2020):140265. |
入库方式： OAI收割
来源：力学研究所
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