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High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses
Pan XN(潘向南); Hong YS(洪友士)
Corresponding AuthorHong, Youshi(hongys@imech.ac.cn)
Source PublicationFATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
2019-09-01
Volume42Issue:9Pages:1950-1964
ISSN8756-758X
AbstractThe fatigue behaviour of a titanium alloy Ti-6Al-4V with equiaxed microstructure (EM) under different values of tensile mean stress or stress ratio (R) was investigated from high-cycle fatigue (HCF) to very-high-cycle fatigue (VHCF) regimes via ultrasonic axial cycling. The effect of mean stress or R on the fatigue strength of HCF and VHCF was addressed by Goodman, Gerber, and Authors' formula. Three types of crack initiation, namely, surface-with-RA (rough area), surface-without-RA, and interior-with-RA, were classified. The maximum value of stress intensity factor (SIF) at RA boundary for R R in HCF and VHCF regimes. The SIF range at RA boundary for R > 0 also keeps constant regardless of R in VHCF regime, but this value decreases linearly with the increase of R for surface RA cases. The microstructure observation at RA regions gives a new result of nanograin formation only in the cases of negative stress ratios for the titanium alloy with EM, which is explained by the mechanism of numerous cyclic pressing.
Keywordfatigue crack initiation mean stress stress ratio titanium alloy very-high-cycle fatigue
DOI10.1111/ffe.13050
Indexed BySCI ; EI
Language英语
WOS IDWOS:000479081900008
WOS KeywordCRACK INITIATION CHARACTERISTICS ; EARLY GROWTH ; FORMATION MECHANISM ; GIGACYCLE FATIGUE ; LIFE DIAGRAMS ; TI-6AL-4V ; STRENGTH ; RATIO ; CONSTANT ; REGION
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Multidisciplinary
Classification二类
Ranking1
ContributorHong, Youshi
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79748
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Pan XN,Hong YS. High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2019,42(9):1950-1964.
APA 潘向南,&洪友士.(2019).High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,42(9),1950-1964.
MLA 潘向南,et al."High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 42.9(2019):1950-1964.
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