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Crack initiation mechanism and fatigue life of titanium alloy Ti-6Al-2Sn-2Zr-3Mo-X: Effects of stress ratio and loading frequency
Sun CQ(孙成奇); Li YQ; Huang RX; Wang L; Liu JL; Zhou LL(周玲玲); Duan GH(段桂花)
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2020-11-04
Volume798Pages:140265
ISSN0921-5093
AbstractIn 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.
KeywordTi-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
DOI10.1016/j.msea.2020.140265
Indexed BySCI ; EI
Language英语
WOS IDWOS:000587608800001
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key Research and Development Program of China [2017YFC0305500}
Classification一类
Ranking1
ContributorSun, CQ
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/85427
Collection非线性力学国家重点实验室
Affiliation1.{Sun Chengqi, Zhou Lingling, Duan Guihua} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China
2.{Sun Chengqi} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China
3.{Li Yanqing, Huang Ruxu, Wang Lei} China Ship Sci Res Ctr State Key Lab Deep Sea Manned Vehicles Wuxi 214082 Jiangsu Peoples R China
4.{Liu Jialong} Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China
Recommended Citation
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.
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