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 Author | Hong, Youshi(hongys@imech.ac.cn) |
Source Publication | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
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2019-09-01 | |
Volume | 42Issue:9Pages:1950-1964 |
ISSN | 8756-758X |
Abstract | The 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. |
Keyword | fatigue crack initiation mean stress stress ratio titanium alloy very-high-cycle fatigue |
DOI | 10.1111/ffe.13050 |
Indexed By | SCI ; EI |
Language | 英语 |
WOS ID | WOS:000479081900008 |
WOS Keyword | CRACK INITIATION CHARACTERISTICS ; EARLY GROWTH ; FORMATION MECHANISM ; GIGACYCLE FATIGUE ; LIFE DIAGRAMS ; TI-6AL-4V ; STRENGTH ; RATIO ; CONSTANT ; REGION |
WOS Research Area | Engineering ; Materials Science |
WOS Subject | Engineering, Mechanical ; Materials Science, Multidisciplinary |
Classification | 二类 |
Ranking | 1 |
Contributor | Hong, Youshi |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://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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