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, Chengqi3,4; Li, Yanqing2; Huang, Ruxu2; Wang, Lei2; Liu, Jialong1; Zhou, Lingling4; Duan, Guihua4 |
刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING |
出版日期 | 2020-11-04 |
卷号 | 798页码:13 |
ISSN号 | 0921-5093 |
关键词 | Ti-6Al-2Sn-2Zr-3Mo-X Stress ratio Frequency Crack initiation mechanism Fatigue life |
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. |
WOS关键词 | HIGH-CYCLE FATIGUE ; TI-6AL-4V ; ALPHA ; BEHAVIOR ; FAILURE ; MICROSTRUCTURE ; STRENGTH ; SIZE |
资助项目 | National Key Research and Development Program of China[2017YFC0305500] |
WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE SA |
WOS记录号 | WOS:000587608800001 |
资助机构 | National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/98711] |
专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
通讯作者 | Sun, Chengqi |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.China Ship Sci Res Ctr, State Key Lab Deep Sea Manned Vehicles, Wuxi 214082, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.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, Chengqi,Li, Yanqing,Huang, Ruxu,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,2020,798:13. |
APA | Sun, Chengqi.,Li, Yanqing.,Huang, Ruxu.,Wang, Lei.,Liu, Jialong.,...&Duan, Guihua.(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,798,13. |
MLA | Sun, Chengqi,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):13. |
入库方式: OAI收割
来源:地质与地球物理研究所
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