| 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)
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| 通讯作者 | Hong, Youshi(hongys@imech.ac.cn)
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| 发表期刊 | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
 |
| 2019-09-01
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| 卷号 | 42期号:9页码:1950-1964 |
| ISSN | 8756-758X
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| 摘要 | 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. |
| 关键词 | fatigue crack initiation
mean stress
stress ratio
titanium alloy
very-high-cycle fatigue
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| DOI | 10.1111/ffe.13050
|
| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000479081900008
|
| 关键词[WOS] | CRACK INITIATION CHARACTERISTICS
; EARLY GROWTH
; FORMATION MECHANISM
; GIGACYCLE FATIGUE
; LIFE DIAGRAMS
; TI-6AL-4V
; STRENGTH
; RATIO
; CONSTANT
; REGION
|
| WOS研究方向 | Engineering
; Materials Science
|
| WOS类目 | Engineering, Mechanical
; Materials Science, Multidisciplinary
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| 论文分区 | 二类
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| 力学所作者排名 | 1
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| RpAuthor | Hong, Youshi
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/79748
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| 专题 | 非线性力学国家重点实验室
|
推荐引用方式
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.
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| 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.
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| 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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